Can a retrospective transaction take place if a refund has taken place on the original transaction?
No, a transaction cannot be retrospectively applied if a refund has been performed on the original purchase.
Any refunds will be reflected in your Sparks balance. If you return an item as faulty, you will keep your sparks as a gesture of goodwill.
For further information see terms and conditions on marksandspencer.com. © 2017 Marks and Spencer plc