CANCEL MY CREDIT

I paid upd my RCS card on the 27th of November. Sent through an email to them requesting that they cancel my card as i no longer wish to have credit. I also attache proof of payment on the email, no one responded.

I called them two days after (call centre) and i was promised that someone from their head office will call me with 48 hours to confirm my request and take it forward.

It is not mid-December and I haven't received any calls, feedback, response to emails.

CAN THEY JUST CANCEL AND SENT ME A LETTER CONFIRMING THIS REQUEST.