Tenant and Seller Signed Estoppel Letter now disputing the lease

[Benton Pruitt]

Just bought a lot with two houses, low income housing. Both leases state that the tenants pay their own utilities. Both tenants and seller signed an estoppel letter stating no amendments to the lease. Turns out all utilities are in the name of the owner and he has been paying them. To me this sounds like a misrepresentation and this severely impacts the profitability of the houses. Do we have any legal recourse?