Telkom, never again

I cancelled my Telkom service (voice + ADSL) in December 2022, this after I was left without service for 2 weeks. I raised a number of support requests with Telkom but they were never in a hurry to assist. Telkom then credited my account with the equivalent of the period which I was l was not connected to their service. I further requested a refund of this credit which now they are refusing to pay, without mentioning any reason. I was given credit which I didn't ask for and now I telkom is refusing to give me the funds credited without a reason