Vodacom service is pathetic.

i have asked for my contract to be cancelled. it was on a month to month basis. i been phone for the last few weeks and i want to cancel my contract. not vodacom says i have a new contract of 199.00 per month which i have not signed for nor do i have a phone. VODACOM i need to cancel my current month to month contract, i need my number as pay as you go -prepaid. please can you do this for me URGENTLY. i am tired of speaking to different operators every time. explaining my storey. its frustrating. please can someone call me and cancell my contract.