Complain

I had cell fone contract with them and I was suppose to be terminated 2018 becos they said it's a two years contract and 2 years passed I tried to communicate with them via emails but no luck then I left it.then last month I called them to say I dnt want contract anymore them they said on da 27 the contract will end and my fone will b back to prepaid even today nothing please help Refilwe Mokoka