Payment not reflecting and no communication from Mobicred

I have made a payment of 2000 into the account of Mobicred In order to decrease the balance they have not updated it on they’re system since the 20th Nov when I made this payment of which they’re statement says if I used the link (which I did) the deduction would reflect immediately. I have sent proof of payment but I have not been assisted. Yet they are able to flood my inbox with deals they think I’m interested in.