Teljoy's unauthorized debit orders.

So 24 December I ordered a new washing machine. It gets delivered middle January. 4 days after I ordered the washing machine a debit oder goes through. Mind you my account is paid up and I do not have my washing machine so there is no reason for this debit order and thr amount is higher that the amount fornthe washing machine. So it can't be pro rata for something I do not have. End of January the debit order that includes the washing machine goes off as on the agreed date. 5 days later another debit order is deducted almost double the washing machines price. This amount also does not appear on my invoice. A mounth later it happens again... 25th my debit order as per invoice goes off and 5/6 days later a bigger amount goes off as the one in December. Now I can't get an answer from them. Deneo refuse to answer my request for why I am paying an extra amount that is not mentioned on any invoice they send me. Why the deducted the intial amount when my account was already paid for December and before I received my goods. She just keep on sending emails on "you promised to pay". However she seems to be unable to answer ANY QUESTIONS on why there is an extra amount that I need to pay and why it increased as from the next month. Mind you, both amounts is much more than the cost of the new washing machine. Can't get any one more senior to talk to. So my frustration with teljoy is through the roof.