Trying to cancel debit order

For the past three months I've requested my debit our to be cancelled but it seems Clientele is so desperate for money that they just do not want to cancel it. I've received a response with a reference number and was told that I would receive a call from client support but instead they would rather deduct from my banking account. Deducting from my account without my consent is *****. People please be warned do not sign anything with Clientele as I feel they cannot be trusted.