Cheesed off seriously!!!!!

I had 3 or 4 contracts with Vodacom a while back, i then contacted Vodacom and asked them to put a termination instruct on all the contracts for the term end date. (so when it reached term end date it will terminate automatically.There is now one contract that has slipped through (i thought it was still one of it that's still in contract hence i was still paying R185 pm), i thought i should query it and i found that this contract expired in Sep 2013. So i have been paying R185 for 15/16 months for nothing.I called Vodacom and they then had to investigate.Result is that i will not be reimbursed as it was my fault! What happened when i called for all contracts to terminate on term end date?How did all the other contracts end but not this one? I was going to take out a new contract with Vodacom as i need a new phone and they could perhaps work something out with a reduced contract fee as compensation. They would take none of that! Hence me being ****ed off! If no such agreement can be made then how pathetic of Vodacom. By the way i'm quite a long serving customer and as i see it, they are not bringing their(Vodacom) part! I just want my money back or reduction on a contract fee!!!!!