Topup system errors on Telkom

Telkom' s Topup function keeps giving system errors - on the Telkom www.telkomsa.net website as well as on the Telkom app. I have tried multiple times in the past week to top up DSL data, to no avail. My credit card details are entered correctly, and I even get an OTP, which means my banking side is okay. Nevertheless, once the OTP is entered, I get a No Authorisation response ... or a system error response. My bank says there are problems with the Telkom patch. I feel sorry for the Telkom Customer Care workers. They do their best to be helpful, but they can only go so far. Nowhere do they seem to be empowered to actually refer me to someone at IT who can take note of the problem and do something about it. I phone 10210, and get referred to 018180, who then refer me to sales ... where I get no reply.