UPGRADING OF ACCOUNT WITHOUT CONSENT

I recently received a random sms from Absa saying that UTI will contact me to deliver my card to me (which I thought was a ****). I had eventually received this call from UTI and was told that they wanted to deliver my \Gold"card to me. I told the UTI consultant that I do not know what she is talking about as I do not have a Gold card. She told me that it is their instructions to deliver this Gold card to me and that I should enquire from Absa why it is a Gold card. I them manage to get in contact with Absa's credit card division which in itself was a huge mission to only be told that they automatically upgraded my account! I told the Absa consultant that I did not ask to be upgraded nor did I give them my written consent. She then told me that should I want to cancel or decline this then I must visit the branch. Now can someone please explain to me why I have to go to the branch to cancel/decline the card on my account which was upgraded without my consent and which I did not ask for?? I have lodged a complaint via Absa's website last week Wednesday"