[dcomp]

Probably because you can't dispute for any reason. But if there wasn't enough notice. If you don't give 10 working days notice (unless initiated by the person). An immediate refund can be requested.

Bad service isn't a reason for a refund. And if the person doesn't say "This debit was in error. I wasn't given notice" or similar the bank will usually say this is a legitimate direct debit [0] https://www.directdebit.co.uk/DirectDebitExplained/pages/dir...