Debit orders that can’t be reversed!

ITutoring or ITutor whatever they call them are a total sc*%. They have an underwriting of London School of Investment. The worst nightmare! Can somebody tell me how they dealt with them for deducting money for services they have not rendered. You can’t even remove their debit order from the bank these people! Something needs to be done asap about this business. Someone who has survived them, can you please help? What do I need to do for these people to stop debiting from my account? Lawyers? It’s been a year of debit orders from my account for no service rendered. They are not tutoring anyone! Lies lies lies.