Non-receipt of the merchandise

Dear Sirs:On December 7th, 2023, I purchased the product Coros - Apex 2 Pro Kilian Jornet Edition - Smartwatch on the EBAY website.24 days have passed since the stipulated delivery period without the product having been delivered to me. I am no longer interested in purchasing this product.I attach a photocopy of the following documents:- Invoice- Proof of shipping paid by me indicating that it is sent by DHL, however the package is supposedly paralyzed at the POST OFFICE, where no one attends to my request for dispatch.-Mails with your Customer ServiceI REQUEST the termination of the contract and a refund of double the amount paid.Without further ado, sincerely.