I bought Mitsubishi eclipse cross in September 2021,dealership had a 1 yeqr tracker contract with them, after 1 years the contract ended between them

I bought Mitsubishi eclipse cross in September 2021,dealership had a 1 yeqr tracker contract with them, after 1 years the contract ended between them. Dealership told me it was free on my side. November 2023 I trade in Mitsubishi with cherry tigo then a took tracker contract with cartrack which was around R130 a month and increased to R164 after a year. All of a sudden in June 2025 they debited R305,I reversed it and contacted them asking about the difference,I was told they are debting for Mitsubishi, my concern is why they have been quiet for so long and decided to debit after 2yrs 9 months