Vodacom *****ing my money

i am very disappointed with vodacom service, i have two cellphone contract with vodacom for a long time which i pay them very well until last year December 2017 when they deducted more money and when i went to vodacom store to inquire and i was told that there is a 3rd contract which was opened recently and i told them i don't know anything about it. They advised me to do an affidavit at police station and email it together with my id copy with 3 signatures and sent it to ********** and after i received the ref: 1- ********** ********** , and i was told vodacom will give a feedback within 7 working days, its been 6 months now since i disputed this contract and they still deduct more and i came back to the store and they told me they still investigating but the amount will be credited so today on the 18/06/2018 i got an sms that they will deduct R9282.03 . Initially i was paying R1468,61 and after ***** the first amount that they deducted was R2422,43 and it was not constant. I had enough i want vodacom to cancel this ********** contract and refund all the money they stole..i have comp**** with them and submitted everything they requested so what is taking long to cancel and i will cancel all my contract and never do business with vodacom.