Lease-back stopped payment

I hope somebody can help me. We bought a leaseback

property in France in 2006 and 3 months ago the money

stopped being paid into our bank account. I tried to

trace the company that paid so far, but can not get a

response from anyone. The company originally involved,

transferred it to another company who transferred it to

another company and I fear they are all no longer

trading. I also wrote to the notary but have had no

response from him either. We are now paying the

mortgage, but we're not in financial position to do so.

Can anyone help? Has anyone had any problems with French

lease-back agreements? Is there another company that

would take over the lease?

Any help would be very much appreciated.