Incorrect billing & Poor service

In Sept 2013 I took out a cellphone contract with auto page expecting it to expire Sept 2015.<br> Before the contract expired I opted not to renew or upgrade and requested to keep the sim card open with no further monthly premiums. This never happened as i was billed through to December.<br> <br> In Nov 2015 I was Billed R1163.36, which includes the premium for the cancelled contract and a premium for another contract I took in Jan 2014.<br> <br> In Dec 2015 I was again billed the same R1163.36. (This is after I've received emails form them saying my December out of bundle charges were less than those of November. clearly their billing system has major errors)<br> <br> This is totally not acceptable and what makes it even worse is that I went to a consultant at their Sandton city branch and she told me everything is fine. I then decided to call again and on the phone a gentleman logged a dsipute and said i will be contacted once investigations are completed.<br> <br> I called for feedback and a lady told me that I had been billed correctly and that nothing is due to me. This lady also told me that I was never charged for the second contract yet my bank statement clearly shows I was Charged.