I'm extremely fed up...

I'm extremely fed up with Ackermans.. Firstly they tell me if I agree for a debit order and they take more then our agreement they'll settle my account then when they take more than our agreement they ask me why would they settle my account? Well who asked them to make that promise in the first place of they can't keep it. Secondly they insist that i have agreed that they can take more that what i agreed on and totally refuse to play my voice record because they lying. Now they harassing me 3 people calling me per day asking me to pay the account while the management said they'll investigate and get back to me which no one did😡