unauthorised deducting of money

Four months ago mtn deducted extra money from my account and i am still batteling to get my money back.There is no way of getting hold of mtn themselves.I tried my service provider but unfortionately just as useless.I was told that even though they made a mistake they can not refund me, i would have to settle for a credit.Well 4 months and numerous mails later nothing .This is not the first time .I have 4 business upgrades wich are due but will make sure i port my numbers to vodacom.I never have this problem with my vodacom phone.Mtn 's service sucks and i will not recommend any person to use them , there is no service .When i upgraded my phone i was told that it would cost me R269.00 a month for a samsung galaxy s5 .i ordered the phone , waited a long time and after numerous calls i eventually was told to collect the phone.When i got there i was told that someone from mtn heidelberg made a mistake and that i would have to sighn a contract for 24 months at a cost of R399.00 a month .I was furious but what can we do we have to settle and move on .Mtn heidelberg and mtn as a company is terrible and i am very disappointed ... tx mtn for the lack of service ...sorry no service !!!