vodacom upgrades nightmare

tried to upgrade 4 contracts. been a customer since 1995 - same number. upgrades couldnt do a deal match, Came back with a deal only to be changed in a few days. ended up cancelling all 4 contracts - but,,,, agent processed one upgrade, so now have to cancell that as device was already delivered. and what was agreed upon is different on the quote. the amount that you sign up for is always around R200 more on your quotation. this is my fourth attem5-t to upgrade/cancell -- hope its the last i have to deal with this company