Worst bank

Worst bank ever. In January I posted that they made a double debit order deduction off my cheque account and after posted on Hallopeter they called me and did a refund. Yet on the end of February they did a double debit order again, I called in on the 2nd of March and asked for it to be refunded as not once did I authorize for them to do a double debit order. I was told it would take 3 to 7 working days to refund my money. On the 11th of March I phoned in as no money has been refunded, I was told that they are not refunding the money. Worst bank ever.