Hollard and Debtbusters making deduction from my account without my consent

I have a account with Debtbusters and was paying payments to there internal debt insurance but the could not produce a court order for compulsory payment for this insurance nor a signed contract to make insurance valued if I claim , Internal insurance company of Debtbuster told me they were however switching to Holland insurance and I declined Hollard insurance offer and no formal contract was produced.I see now that I am making payments from my debt credit providers payment to Hollard to the same amount as previous insurance even tho my debt is 5/6 lower than when started and I did not consent this insurance