Contract Upgraded without my permission!!!!!

I ported this contract in December to MTN, but Vodacom never stopped charging me for this contract, so after 10 months of phoning around, and blaming MTN i was told that they could not port the number as the contract was upgraded at Vodacom Roodepoort, i dont even live there or know them????? Well they upgraded my contract without my permission??? So for the past 10 months i have been battling and paying for your ********* behaviour?? Spoke to Sipho and he promised to phone me back last week Thu (12/11/2015) but guess what NO ONE has phoned me back?????? and i just need to pay vodacom???? I have never been this upset in my life