It's fairly unlikely that they will be any more helpful as time goes by. They have a second mortgage - if they are concerned for their money then they will take action quickly. If they repossess then they first have to pay off Abbey before they can take their share. They will automatically assume that you are also having problems paying Abbey and this will make them even more nervous. The second mortgage is not regulated - which means that they don't have a strict code of conduct to follow (unlike Abbey.)
Speak to GE and ask for their arrears department. Get a response on the phone and ask them to confirm any agreements in writing - this will save conflicting stories. If you can't get anywhere on the phone then write to them outlining a payment proposal, recorded delivery with EVERYTHING on there (details of missed payments, details of previous calls and why you need to do what you are proposing.) If you're feeling really brave then state that if you don't hear from them in writing within 14 days then you will assume that they have agreed to your proposal. Explain that you need this resolved as soon as possible, as there are other more important things occurring in your life right now.
If all this fails then I'd go to the local press. Some of these companies will only learn if you play rough with them.