Cutting my phone after sending proof of payment

I was contacted and told my payment did not go through. I then made a arrangement that I would pay and the consultant said as long as I paid within this week it would not be cut. I made the payment within a day after making the arrangement and then after sending proof of payment 3 times they cut my line. This is terrible service and when you try to find out what is happening the cell c lines are to busy. I want my line uncut asap as I have paid for the service and not receiving it.