Personally, I would say stick with the job you have and maybe see if u can get part time work in a restaurant, pub, bar, hotel etc. to gain experience.
I think this economical crisis will take quite a while to correct itself. Many tourists are looking at coming to the Uk as the pound is quite weak at present.
The other option is to look at is things like the games coming up in London, maybe doing tourist things there to gain experience?? just a thought....or look at doing short haul contract work for an airline if you can.
best thing really is stay in ur job and find p/t work in customer service.
Hope that helps !!