Cancellation

I've been trying to call your call centre bt there was no response, i want to cancel my membership contract that i have with you. You have been great the problem i cannt afford to pay for your debit orders since im currently not working anymore, i will deffinetly come back once i have a permanet job. my email address is ********** and the membership number is ********** 7 i haope you will be able to assist me