Billing issue

Hi. When I went to get the box from the store I was told that my online promo was applied incorrectly. This was for a brand new account I had just created as a new customer. He said that he would have to make a whole new account and could even spell my name a little different because I had already made an account ( I suspect he just wanted his commission) When I signed up for the initial promo I got $10 off a month for autopay. Now even with autopay enabled it is not showing that discount. Please assist.