Warranty plan.service plan and debit order cancellation request.

I called so many time to tell them to cancel my service plan and warranty plan but till today the policy plans are not cancelled instead they tried debiting my account but luckily I didn’t have funds in my account..I repeat cancel my service plan..warranty plan and debit orders I am no longer interested in your services because of your poor service firstly you don’t pick your phone and in terms of emergencies you are always not available but you are so quick to debit so please cancel everything that I have with you immediately and send me the cancellation confirmation letters via email