NON-RESPONSIVE INSULTING & BAD CONDUCT

Upgraded cell contract (1 of 3 with Cell C) - Jul'14. Used by my assistant in SA, I am abroad (Jul - Aug'14). Payment of the contract by dt order - 15th monthly, as per other contracts - continue as normal. In my absence the sim which was in an older handset was ******. Assistant reported to Cell C asking for the number to be blocked. Was informed that this is not possible as the contract does not belong to him. Email from him to report, which I only saw later. On my return I went to 2 different Cell C branches to block the sim, not to cancel as this would incur penalties - Aug'14. In Jan'15 - Cell C informs me I am in arrears. Confused, paid the outstanding amount-requested the dt order be re-instated. Sent an email to Cell C requesting reasons as to why & who stopped dt order. No response. No invoices ever emailed to me. In 22/06/15 got a letter of demand for once off R6500 payment. Account handed over for collection. 11/07 No response since Feb. Cell C indicated I poorly conduct my account, in arrears - Same questions still no answer 28/07. Still nothing. 26/11 Pay full amount/terms with interest. I DID NOT CANCEL DT ORDER - THEIR MISTAKE - I MUST PAY MORE. still no answer