UNAUTHORISED DEBIT ORDER - NOT EVEN A CLIENT OF ADT!!

For 2 months now I am trying to get back my 3 x R180 which ADT deducted from my account - without my permission, I am not even a client of ADT!! I have never signed a contract with them, nor gave them my banking details. After numerous emails, they admitted that the deductions were for another client, how they managed to have the deductions taken off from my account is still a mystery, but what makes me furious is their service, or actually lack of service!! I have sent emails for 2 months now requesting repayment, the last response was on 15 August : "I have send your request to the accounts department await feedback from them" - well this is now 19 September and no repayment or correspondence received. I have read some of the complaints already on this platform, and it seems like ADT's account department is either "*****" or they do not know what they are doing. How can a big company like ADT get away with this, you can't take people's money and after admitting to the mistake, just ignore all correspondence. One thing is for sure, I will NEVER become a client of ADT, this is absolutely ridiculous and unacceptable.