Cancellation not done but cancellation fee paid

Please can you assist. I cancelled my fibre contract in May and made a payment of R85.56 on 11.05.2018 (which reflects on the statement??). The contract has still not been cancelled and I am told I had to send through a proof of payment. The email I received notifying me of the R85.56 charge for cancellation is on a noreply address but then the same email asks for a reply with the proof of payment - these emails obviously bounce.

Please can you either cancel my contract immediately or reverse the R85.56 with interest earned?