Quadruple Debit

After my first month they tried to deduct double my monthly premium from an old bank account. I send through my new banking details. I did an EFT of the double amount, and they advised that I am now in credit, and that my next full debit order would by on 1 June. This morning (***8) they double debited from the updated bank account. So now I have paid them R3679,46 in total from 5 weeks use of uncapped fibre