Complaint against Telkom

My experience with Telkom has only been absolutely terrible and very disappointing. I took out a cellphone contract for a Huawei P20 on 10 July 2018 of R499 pm. This includes 1GB data per month and 10GB data per month for the first three months. The day I received the phone, I received the data of 1GB data for the first month but not the 10GB. My first bill came at the end of August 2018. I had to pay extra for the activation of the contract, which I was aware of. But then they charged me R500 extra for "Out of data bundles". But, my contract has a limit of R1. I went to the Potchefstroom Telkom branch to talk to the manager about the 10GB data I did not receive and the extra money they charged me. She opened a case and sent in a complaint from my side. Case nr ********** 3. I paid the whole amount of the bill after they promised me they will subtract the R500 that I was charged extra from my bill at the end of another month. About 2-3weeks later, on 19 September 2018, I received a sms from Telkom saying my data (10GB) will be loaded within the next 72 working hours. When the data was not loaded, I went back to the Potchefstroom Telkom branch to speak to the manager once again. All they say is I must call the Telkom Customer Service. When I do so, no one is able to help me. On another note, the amount of R499 pm has to be paid to Telkom by means of a debit order. But the debit order doesn't go off from my bank account. I'm not even sure what the date of the debit order is set to. I then have to wait and see if the debit order goes off, like the manager of Potchefstroom Telkom branch tells me to. By the 15th I receive my hard copy bill. I then go and pay the bill cash. My bill is also supposed to be emailed to me. Which also doesn't happen. Yesterday, 3 November 2018, I received a sms from Telkom saying my account has been suspended due to collections. I do not understand how or why. I have paid my bill every month since August 2018. Even though it's a bit late sometimes. But I have to wait and see if the debit order goes off and wait for my bill to arrive. I am very unhappy about my service I received from Telkom and the employees of the Potchefstroom Telkom branch are very unhelpful. What should I do?