Viansa Winery & new Math?

[mm1]

Ok, how would you react? I recieved 50$ gift certificate for being a wine member for 2yrs. (25$ per year). I mailed my order total was 32$ no problem so far right? wrong! seems I owe them $7.00 because they only applied 25.00 of my 50.00 gift certificate to the 32.00 total. Had I gone over 50.00 it would have all been applied. huh?
granted, I was not expecting any credit here, but this is ridiculous, especially when it didnt say a minimum purchase of 50.00 was mandatory. I was expecting to owe NOTHING except the shipping. I'll send back my entire order over 7.00 if I have to and to heck with their gift certificate in it's entirety. Can anyone imagine taking a gift certificate in to a store, and them saying I'm sorry you didnt spend the entire amount, so you still owe us?????????