Cancellation & No customer Service

My contract has expired and I would like to cancel my contract but keep my number and carry on with Pay-as-you-go.<br> Week of 4/5-8/5 - Tried contacting call centre (***) numerous times. After about 5 minutes on each call you get cut off.<br> 11/5 - Went into MTN store at River Walk, Three Rivers to cancel contract, but was told by Ellie I need to send a letter.<br> 12/5 - E-mailed letter<br> 18/5 - Went to store again, but was not there and other staff unable to assist on her behalf<br> 19/5 - E-mail Ellie again and eventually got confirmation that contract will be cancelled within 2 - 3 days<br> 1/6 - Debit order went off my bank account, but assumed that it will be the last as they are billing in arrears<br> 10/6 - Trying to get hold of call centre again as I need to buy airtime. Calls are cut off. Tried to get hold of other departments, eventually got hold of sales. Lady named (Lalisha) says that my contract is still active, but she can not help me as she only deals with sales. She transferred me to call centre, but got cut off again. I need assistance as, I will not pay any more contract fees as I received confirmation that my contract has been cancelled. I have put a stop to the debit order.