I have been a loyal and excellent paying customer for 10 years with TELKOM

I have been a loyal and excellent paying customer for 10 years with TELKOM. 4 years ago, I put myself on debt review to help with the debt I accumulated due to my daughter's cancer. However, this DID NOT affect my payments in the least, and 2 years ago, I even added 2 new contracts without an issue from Telkom. I now want to downgrade my WIFI contract, and upgrade 1 of the others. After 10 years of being an excellent customer, and besides the above, TELKOM is denying me any service, and I cannot get hold of a manager/supervisor or their customer service email. The latter seems to be a myth... they dont have a customer service department