i can see how two coupons for the SAME store would not be acceptable, but most of us used a Jessica London coupon (their codes begin with JL), and an avenue coupon (code begins with av).
One coupon per store ...sounds reasonable to me.
For instance, fashion bug website, there are like 4 stores you can shop at, one checkout. They clearly state one code PER store. Which is what most of us did here. Jessica London and Avenue are two stores, one checkout, so if they dont like that stacking, thats a mistake on their IT part. We didnt use two avenue codes, so I see no wrong.
Either way, its NO EXCUSE for customer service to be so rude. Thats just uncalled for, sorry for those who ran into the scrooges.