Go jump in a see

Contract expired 2 years back and i went to Cell c Jabulani mall to request for upgrade as per the sms i received from Cell c. When i got to the Cell c branch in Jabulani i was then told that i do not qualify for upgrade, i told the lady to cancell the contract since cell c was till debiting my account after the contract expire. Now it has been 2 years that cell c has been quiet and not saying anything but all of a sudden i get calls demanding me to pay cell c. I am not mad and i will not pay any amount to cell c. They say i must provide proof that i cancel the contract but i was not given any proof but the lady told me it has been done. So go or check with Jabulani mall branch since i am not going to do your job for you.