Trying to register new contract no/cancelling old

I've been trying to cancel my expired contract since 2 June 2015, cell no ***. I finally got trough to the cancellation no on 13 June 2015 and given a ref no ***3~4. I've had no email confirming the cancellation. Also money for this contract was deducted from my banking account on 1July 2015. Kindly advise if cell no *** has been cancelled and from when.<br> Another problem is that I can't get my new contract, cell no *** registered on the network. I keep on getting a message reflecting \ID is already linked to a different profile. Customer care told me to de-register the old contract cell no and enter the new one. There is no function for de-registering.<br> Kindly advise how do I register my new cell no.<br> I get the feeling that customer care is not very clued up how to handle these discrepancies."