Hi there,
You have a few options.
1. If you need to balance transfer again, you still have a few options. Ulsterbank provide a 6 month transfer at 0%, with no fee. You read right - no balance transfer fee at all. Also, they are super quick. I applied, and had 3000 pounds in the destination credit card within about 7 days - amazing. Abbey also offer this no fee 0% service, but, they are proving to be a nightmare. They agreed to my application back in August, yet my application has been 'stuck' ever since, and they are utterly hopeless at investigating it so bear that in mind.
2. For piece of mind, you could just convert all the cards into a proper loan from a bank, at say 8%. Yes, it will cost you, but, unlike the credit cards, the payments will not break you, and after 2 or 3 years, it will be paid off. You'll sleep easier.
3. Potentially, sell the car. It doesn't sound like you have any means to pay the costs, let alone anything else. Perhaps public transport is something to at least consider. For some people, it's a wise move i.e you rarely use the car, live next to a station.
Good luck