Worst provider ever

I bought a recharge voucher and the voucher did not work. I called the customer service and I was told that the matter has been escalated to management and I must wait 24 hours and keep on checking on my phone to see if the air time has been loaded.After the call I discovered that Telkom has blacklisted my number because I entered a voucher number in too many times which: 1- Is correct and not yet used and is correct yet the airtime does not register when the voucher number is added. This is ridiculously unfair. It is not my fault if their voucher number does not work, yet I am penalized for it. 2- I have sent an sms to the 188 number as they said. 2-The message stated that my number was blacklisted for the rest of the day which was now 12th October 2020 from the afternoon till midnight. 3- Woke up this morning on the 13th October 2020 and my number is still blacklisted and the message says that it is for the rest of the day. 4-Nobody picks up on the call centre number- one hold on for hours and there is just no answer. Worst provider ever!!!