I made the mistake of buying the full pass when I bought BF4. Couldn't get on with the game (except one hilarious bizarre evening with Tam and Euan in a helicopter) and I'm afraid to load it again as I'd be swamped with all these goodie boxes!!
Have you checked with Virgin first. tell them you're leaving and you'll squeeze something out of them
Also I have a feeling that we're being upgraded to up to 50mB soon at no extra cost