Hi Amber
the problems that Rainbow frachisees such as yourself are encountering are quite well known through out the industry indeed I was talking only last week to guy looking to buy a franchise who said to me he wouldn't touch Rainbow with a barge pole at the moment.
I wouldn't completley rule out how your in house organisation can help you but it would need the will of the whole network and not just a few to make it work.
You need to get them to call an EGM of all franchisees excluding management at a location central for all.
You then need to set an agenda for the meeting, on arrival only, so it doesn't leak out.
What you all need to agree to do en- mass is a refusal to carry out all restoration work until your problems are resolved or at least an agreement to resolve.
The impact of this on your network would be major of course, loss of earnings, maybe the loss of contracts (which is happening any way).Your franchisor will threaten you with termination but then they would have to terminate the whole network making future sales of licenses worthless and I have no doubt the BFA would want to take a look.
Of course none of this would work if some of you carried on working as normal (and some of you will) but what would happen is the Franchisor would be made to sit up and take notice and at least listen to what you have to say.
Remember the whole strategy of franchisors in your current situation is to Divide And Rule if you join together it will panic them into action.

Good Luck