Bad customer service total *******

MTN home internet is the worst, I paid upfront to get the service on the 6th July 2024. The router was delivered on the 10th July 2024. On the 15th July 2024 they tried to debit my account for the same amount I paid on the 6th. I have been sending POP to 5 mtn call centre agents. On the 15th August they are saying I must pay R728.90 as they cannot locate the R494 amount I paid initially. Remember you cannot get the service before paying them. I am going to reverse the debit order if they don't resolve this and take the router to their nearest store. Very very bad service. Please don't buy their service.