Dispute for Payment Resolution with Cartrack Insurance

I joined Cartrack on the advice from King Price Insurance as King Price claimed to be utilising Cartrack platforms to calculate kilometres traveled from my three family vehicles and an amount of R 207.00 were monthly premiums for Cartrack. When I realised that King Price has increased dramatically their premium in Aril 2021 I immediately terminated the contract and also Cartrack as they work together. Please also be advised that I also have Nestar Insurance at R 124.02 monthly premiums for one vehicle. King Price allowed us to part ways BUT Cartrack demands R 2 326.68 for cancellations and claiming an amount of R 6 980.04 for three vehicles. An amount of R 621.00 is also demanded for their so called outstanding monthly premiums. I would like to understand if whether is fair for Cartrack to claim this amount as they never submitted calculated figures to King Price to inform payment for premiums.

I will appreciated whatever assistance for this claim as Cartrack consultants are calling me everyday unabated enforcing payments for monies I currently cannot afford and whether Cartrack is in their right to demand the amounts of monies as stated from above.