Incorrect amount debited from my account since October 2022

I regrets the day I took contract with Netstar, October 2022 I purchased my second vehicle and decided to take contract with Netstar as my current vehicle was with them .I sold my one vehicle and requested netstar to remove this sold vehicle on the contract and they advised me that they will do that as my contract came to an end, Netstar is still deducting the same amount on my account since November last year, Extra R150 is deducted every month from my acc, They advised me that its been fixed in January 2023 but still same amount has been deducted now in march . I wonder if they will be able to respond in case of emergency ( Worried  ).