Car track poor services

Recently I have had really bad service from this company.In July I had reversed a payment then made arrangements to make a manual payment on the 26th August,the manual payment was done via the link they sent ,they then deducted on the 28th August and the 31st...so they double debited me of which i then reversed the one payment as i already made a manual payment to clear the arrears .They sent me confirmation on the 5th September confirming the account was up todate. now again I get debited on the 30th September and again on the 2nd October....which is absolutely ridiculous...from now on I will not pay for such poor services