Netstar ****

I bought my car in 2023 and the dealership provided me with a once off Netstar tracking device which came with the car and was free for a year, never signed a contract with Netstar directly. This year Jan I saw a debit order of R178 on my account and I reversed it, later that week I received a call from Netstar asking if I want to renew my contract and I told them I don’t need it, I never needed it and never signed a contract. Now I’m getting endless sms from debt collectors that I owe Netstar, now double the amount. Please rectify this mistake, I never signed a contract with Netstar to debit my account, if need be, I need the device removed from my car. Netstar doesn’t even care to call me regarding the debit, they just hand it over to debt collectors and unfortunately I never agreed to any debit order or have contract with them, I need to know where do they take my bank details from and who authorised them to debit my account