Non existant service and theft

I had a 2 year contract with Glocell and just before the 2 years where over I phoned the call center maybe 3 times and every time the reply were the same they gave me a date to cancel and also forwarded a "termination of subscriber agreement" which I completed and forwarded with a copy of my id to them. After a while I received the following reply from them stating that my contract will be terminated and my last payment will be 25 Oct 2017 and that the number will be migrated. Easy so far not a problem.

1 November 2017 I received a new bill for R220.00 and I sent them a mail to find out what was happening needless to say no reply and on 1 December they deducted the R220 from my account which I reversed and received a new bill for R440. I phoned them and what an experience everybody I spoke to before this guy were wrong the mail I received was wrong but he will meet me halfway if I pay the R220 he will stop the second R220 and does not matter what I say I must listen to him and eventually he put the phone down.

I also sent them a new mail with all the info and received no reply.

On 2 January 2018 they deducted the R440 which I reversed again and then yesterday I received a bill with a credit of R149.03 so I only own then R290.97

Glocell I own you nothing and you are trying to ***** my money you are not allowed to take anything from my account for a cancelled contract on a sim card that does not excist that is theft do I have to report this to the police?