STILL Debiting my Account but my Contract ENDED a month ago !!!!!

Hi My contract with Cartrack ended in October 2018 . Cartrack took an amount of R157.46 from my bank account on 1st November 2018. Debit orders will be unable to go off from my account due to Cartrack debiting my account for an amount a service i have no contract with i will keep Cartrack liable for any banking fees charged for debit orders that wont be able to go off asfor i leave the exact amount in my account for the debit orders to go off and therefor my account will be short. Kindly refund the amount taken from my account. Regards Charne