Poor Service, No knowledge of debicheck approved with my banking app

I have been getting poor service from clientele....i called countless times to ask them to reverse the money that they have been deducting from my account for 2 policies whereas i only wanted one , which was a funeral cover I'm surprised they opened another one which is a wealth plan , which I don't have any knowledge of. I tried to cancel the debicheck on my banking app but it says cannot dispute debit order and my bank can't help me as well Most of my details on both policies are wrong And I wish to cancel both of them and plead with them to reverse the money they deducted from my account