80.—(1) The payer must request a refund under regulation 79 from its payment service provider within 8 weeks from the date on which the funds were debited.
(2) The payment service provider may require the payer to provide such information as is reasonably necessary to prove that the conditions in regulation 79(2) are satisfied.
(3) The payment service provider must either—
(a)refund the full amount of the payment transaction; or
(b)provide justification for refusing to refund the payment transaction, indicating the bodies to which the payer may refer the matter if the payer does not accept the justification provided.
(4) Any refund or justification for refusing a refund must be provided within 10 business days of receiving a request for a refund or, where applicable, within 10 business days of receiving any further information requested under paragraph (2).
(5) If the payment service provider requires further information under paragraph (2), it may not refuse the refund until it has received further information from the payer.