Poor customer service

Car tracker worst customer service. Requested the agent to change my debit order date in the beginning of March and I was told that it will be change after 30 days. To my surprise Car tracker has been debiting my account since Wednesday where else I requested the date to be changed. Also last year a tag was inserted and the company didn't debit for almost 5 months then end of the year letter of demand apparently they had a system problem and accounts department realized after 5 months then they debited my account without an arrangement. I feel trapped by this contract. Contact ed customer service no response and they debited again this morning . Now I must pay the Bank for unpaid item all because the agent didn't change the debit order date