Telkom *********** call agents

Good day,I took out a contract for wifi with Telkom,a agent phoned me with a deal and I accepted,I gave all my details including my banking details and when to debit,my account was not debited for THREE months I tried making contact but no help now I went to telkom canal walk today and I had to pay R1600 and the banking details the agent that phoned me captured was very far from correct,I would like answers as to how the agent entered the INCORRECT banking details AND how the contract was approved with the INCORRECT banking details,this is not what you expect from a well established business like Telkom,the people in store today at canal walk could not give me answers as well so pretty much useless going in store. I would please like to have answers and can the agent that phoned please be delt with and what about my inconvenience? Oh and as well my wifi was disconnected because telkom debited the wrong account which was once again the agent's fault. So can a senior please look in to this as this is not acceptable. I paid my account today and it's still not activated,I've phoned your call centre countless times bladdy useless.