Expired contract not being closed as requested!!

my contract expired approximately two months ago ,I have sent multiple email requests for termination, both before expiry day and after. I have even been to my local mtn where a migration form was filled in and still I receive nothing from them and the contract is still running and I had to pay at the end of last month for a contract I requested to be canceled and now I looks like I will have to pay this month again!! I no longer need their services a consultant by the name of Samu spoke to the gentleman at my local mtn when the form was submitted by me and gave me this reference *** and I was emailed a copy of the form, but they continue to leave the contract running. I have also kept all email correspondence (as the call centre 808 hangs up on me EVERYTIME I call it) since May stating that the contract must be terminated upon maturity. I closed this account because I cannot afford to have It any longer, it has matured and isn't in my plans anymore but they keep on sending data forcing me to pay .I don't need this contract any more our agreement was only for 24 months I am fed up with the service. Will someone please get back to me! I wish to have it terminated & be refunded