Poor customer service

I took out two cellphone contracts with cell c and a router. I paid the closure amount for the router and closed that line. I requested the closure amount amount for one of the Cellphone contracts, I paid R 2300( not the exact amount but ranges there) and requested the contract to be discontinued. For the month of August I was not debited and I went to the Glen mall to find out what was the matter as the statement had been issued. Nobody could explain why but they assured me everything was fine. September month end I was billed for two months an amount of R 2058 and to my surprise the contract was not cancelled but the months were amended to 0, I don’t know why. I asked them why was the line not cancelled and why am I being double billed, no proper explanation instead I was told the the amount is for the router and the two cellphones. I was very unsatisfied because now in a matter of two months I have paid R 4458 for lines that were not cancelled. The solution I was given was that I must go the Cell C head office in Midrand that time I stay in the South of Joburg. Disgusting services I’m getting. Now my lines are locked