Open an account with Aramex (a courier company). For this you need to go to Landmark. Their counter is in the corridor in front of Carrefour. They will give you a UK address with a unique ID. On all ebay and amazon purches, mention that address as delivery address. Once your packet is recieved in Doha, Aramex will ask you to collect it from their office (in industrial area).

Hope that helps :-)