Hi Phoenix14, I am sorry to hear about your situation, I am sure it is very stressful. I don't think though there is quite enough information for anyone to give you a useful response, laying out the financial situation will elicit more responses as people will have something to work from.
On whether or not you have any sort of case for the bank mis-selling you a product. On what basis is your friend asserting you should not have been sold it? Would you be in any better a position now if you had not availed of it?
From what you are saying, you are in a hard place but not the worst place possible, you can settle your debts by selling your home but that leaves you in a weak financial position as you approach retirement.