We are not the customer and we are not ebay but buyers and sellers like your self.
Goto purchase history, find the flannels and you need to click more actions and action a return under item not as described. Ebay will issue you a label to return the item and once returned you will receive a refund within 3 days.
Read this and familiarise youself with it in case you run in to future problems.
https://pages.ebay.co.uk/ebay-money-back-guarantee/