Debit order taken off early

Utterly terrible service, I phoned on the 1st December to ensure that my debit order only goes off after the 22nd Dec. as I only then will be paid. Note that my debit order date should be the 1st of every month. I spoke to a consultant who informed me that the debit order will only go off on the 1st. I confirmed this multiple times as I do not have the extra cash lying around to have debit order going off a week before I get paid.

This morning when transferring the last of my money into my bank account so that I could survive a week of putting in fuel, etc. the debit order went off. I phoned another consultant who told me that I had been given the wrong information. I need that money and explicitly asked that my debit order go off after my pay date. The consultant I spoke to this morning told me that I could not change the date of which the debit order goes off, which I think is utter nonsense as not everybody gets paid early in December.

Terrible customer service