vodacom is *****ing from our accounts

On the 24/25 I phoned to cancel contract ********** 162. Told the lady not to touch my account as she wanted me to change my package and at the time my credit balance was R2052.35 . However when I took a balance enq on monday R1340 was missing from my account. I phoned the callcentre and lay a complaint and requesting that my money be paid back into my account and ref 1- ********** ********** to investigate. They tried to tell me that I have forveited my money and I told them I pay the account and if I wish to save my money it is my choice. . Requested to speak to a manager. A Lady called me but call was cut of, then Dean phoned and said I will have my money back by wednesday. Tuesday received msg that case was closed and no refund. I once again phoned in new case opened ref 1- ********** ********** . Spoke to Nkatko.The sms for this case was send to a contract that I have closed many years back . Phoned in again spoke to Dumisani and said that msg was sent to wrong phone nr. He told me that request was given through on the right nr. Got a msg todat case closed and only R700 refunded short R640 and a R100 more money gone from my balance between tuesday and wednesday. They are *****ing from us and there excuse is that money falls of the acccount but all of them have different times one says 3 months the other says 6 months and Dean said 7 months. I want all of my money back