******* debit orders

I must say, I am sick and tired about this SMV company or whatever they are. They have *******ly been debiting my account since last year September and they not stopping. have been paying bank charges for them for months or having to do reversals but they still continuing. I don't know them, don't know what business are they in and have never heard of them except seeing their name on my bank statements. honestly, I can't go on like this, now I'm forced to change banks because of the unauthorised debit orders that goes through my account monthly and leaving me on a negative balance not forgetting - denting my account. Can Smv enterprise stop going through my account without my permission - that is *****..