Buying a down comfortor...aka the bitch at the Select Comfort store.

For Christmas we asked my MIL for a new down comforter, our old one was really worn out and we couldn't think of anything else we wanted or needed so it seemed like a great gift.
My MIL decided to get us a comforter at the Select Comfort store, we have a sleep number bed and love it (as do our ILs) so it seemed a good fit, plus it's two separate pockets so each person can choose their own insert and warmth rating.
So in early January we headed to the mall to visit our local Select Comfort store. Dan hates the mall so it was quite an outing for him to go to the mall. We get to the store and tell the sales gal that we're looking for two inserts for a down comforter (MIL had already bought the cover and some gift cards to put towards the inserts).
The girl is helpful and we decide on which inserts we want (of course we choose the same so it sort of defeated the purpose but whatever) and started looking at the other things they sell since they were having a buy one get one free sale on accessories.
I've been trying to find a duvet set that I love to replace ours, and they just happened to have a gorgeous blue duvet set.
At this point we're pawned off on another sales woman...fine whatever. It should have been a red flag that as soon as she started helping us she oh-so-kindly pointed out that Natalie needed to have her nose wiped. Uh okay thanks but it's not really your business (and it wasn't bad at all)...but I guess since we were letting her jump on the beds she felt the need to point out the snot faucet my kid had going on.
Then, I tell her I'm interested in the duvet set, she looks at me blankly, I again say that I'm interested in the comforter cover set (thinking maybe she doesn't know what a duvet is), to which so replies "you already have a comforter cover...your MIL bought it for you" (apparently she helped MIL buy this stuff). I reply that I know we have the cover, but I'm interested in the decorative covers, and gesture to the display. Again she snottily tells me that I already have the comforter cover, at which point I start getting peeved...WTF lady do I need to spell it out for you I've said it 3 different ways and I'm speaking clearly. So I walk over (er waddle cause ya know I had to play up how difficult she was making this for me) to the duvet cover and hold it up for her to see. She says "oh you mean the bedding sets", at this point I'm fuming, Dan is watching me from the other side of the room ready to run over to diffuse the situation if need be. So I calmly reply "yes the bedding sets otherwise known as a duvet right?!?" she looks at me and says "uh yeah sure", then looks at the price tag and says in a condescending tone "Um you know this is a $500 bedding set"
At this point I'm choosing my words carefully as there are other customers in the store and my kid is sitting only a couple feet away, so I say "yes I know, can you tell me what is included in that set" Dan is now inching towards me since apparently he can see the future.
Again she snidely replies " well it IS $500, is that really workable for you". Are you fucking kidding me lady, I've been trying my hardest to hold back but now you're just baiting me. Who are you to assume how much I can afford to spend on something. At this point she must be able to read my face and the fact that I'm about to rip her fucking face off....so she starts back peddling...with things like "oh well it is very nice, what size would you be looking at?, it includes xy&z etc"
Dan has now made it across the room and is fully prepared to hold me back. But I take a deep breath and say "I think we're done here" she keeps trying to smooth over the issue, and finally sternly I tell her "I'll gladly pay for the inserts, but I won't be buying anything else from you."
Finally she stops, walks to the register and begins processing the order, then she starts trying to make small talk with me....of course I'm in no mood for that so I tell her "I've had enough, I'd like to just pay, no need for you to try to butter me up now"
Dumbfounded she looks at me and stammers "umm, err, uh..." I tell her to just complete the order so I can leave, and she does so in silence.
See...I'm making progress....I may not need anger management after all.