Unaware of discount

I went into the Cresta branch on 2 Jan to renew my membership for 2020. I had to request the 15% discount that should have been automatically offered to me since I was paying with a standard bank credit card. Freddy's initial reaction was that they don't offer this discount and that I should take it up with standard bank. Upon my insisting that he call head office to clarify the discount I was then offered the discount on my husband's membership but not on mine since I am a spousal dependent. I was told that this was AA policy but nobody was able to show me any documentation to this effect. I didn't renew my membership and have no plans to do so. How many other people have been ********** in this way by the AA?