Useless "consultants"

Absolutely useless. Two months in a row I have had to call them because their systems have changed my contract payment to cash, even though I have a debit order. On 17 August I went in to the branch at Liberty Midlands Mall to pay and told the "consultant" to change my payments back to a debit order for the 28th of every month, which he said he would do. I have had to call them today 02 September to find out what was going on as they have not debited my account, only to find that this "consultant" had not bothered to change my payment back to a debit order. This carry's on, I am cancelling my contract.