Unprofessional Service

I have a debit order with VOX, some months they do not deduct the monthly fee. I find out that my internet is suspended. I make the manual payment and still no internet after I have reset everything. The accounts department can't tell me why it is not deducting the monthly fee sometimes. There is always money in the account as it is a business account, I never run out of funds. This is unacceptable. To start work the morning and find out there is no internet. After payment still nothing. Worst service ever.