CANCEL MY CONTRACT SEEING THAT YOU DONT WANT TO CONTINUE WITH AN UPGRADE

I have had an account with Telkom since 2010,and every 2nd year i was able to upgrade now this year my contract expired 25 june,and i was told i dont qualify for an upgrade,so my money was good enough for 7 years i then asked them to close the account ,i was told to email a cancellation form ,which i have send 5 times to them,this account is still not closed and i am being billed for your negligence ,well you can stuff your service,close this account today. id nr ********** 191081-miss lcp van der merwe