Spam calls from TFG

I recently have been receiving spam calls about direct marketing from TFG since January from these numbers ‭+27 (21) ***‬ and ‭+27 (21) ***‬. I have told them that I am not interested in their offer(s) multiple times. They have been calling me almost every day since Jan up until now in March. It’s starting to get on my nerves because I have asked them to remove my numbers from their database for direct marketing calls and they told me I consented to direct marketing when I opened an account with them. I have revoked my consent with no success, I was told to take my ID to their shop etc. I have had enough with their harassment. I decided to just ignore their calls but I also can’t take that now.