Debenhams is happy to exchange or refund your purchase within 28 days providing the goods are in a fully resaleable condition (including tags) and not within the exclusion policy*. This policy does not affect your statutory rights. You can return unwanted items either by visiting your local store (the fastest way to get a refund), by arranging a courier collection or returning by post. Exclusions apply to selected products. For instructions on how to return products and information on Debenhams refund policy visit the returns and refunds section of the website.
Tie looks ok, but the stitching round the back is terribly uneven and can lose its stitching with a gentle pull.
Do note that the 'dry clean only' isn't just there as a precaution - I put mine in the washing machine and its now had to go in the bin.