Charging my account 6 times in one month

Internet Solutions billing is terrible. They charged me for an invoice 6 times in one month. That invoice was being paid by a debit order, together with another invoice, by the way, so effectively, they charged me 7 times. They have now done it twice and they say that it shows that it didn't go through on their side, so they can reverse it. I wouldn't advise anyone to use their services, because you have to run after them all the time to reverse transactions.