Great bra, but size mislabeled...no customer service!!

I have this bra in nude...LOVE it!! Comfy, cool, etc., etc. I ordered it in black for a special weekend occasion...when I went to wear it, the sizing was at least 3 inches off & I had no choice but to wear an extender...it worked, but not well. The following day (Sunday), I sent an email explaining the situation to HerRoom...3 days later I finally get a response saying that I wore the bra, so I'm stuck with it & sometimes bras just come in different sizes. Really?!!? We're talking 3 INCHES (at least!!)!! This isn't the first time I've gotten a raw deal with this company (prior I bought undies...took them out of bag to find a hole & never wore them...they wouldn't accept them back, since they were out of the bag!?). So again, I love the bra, but would NEVER buy from HerRoom again.