First, call a professional and have the damage repaired and the termites treated.
Second, check to see if there was anything you could have done to be aware of the problem.
Third, fix it, learn from it and enjoy raising your family in your new home.
Was there anything in the sellers home disclosure? How about your home inspection?
The sellers property disclosure is required and required to be accurate. Please realize that it would be possible to be unaware of the problem until the termite situation results in damage and could be difficult to say that the seller "knew". That would depend on information that I do not have.
The other protection that you have is your home inspection before closing. Did you have one done? Even if you did not contract a termite, a home inspecter should recognize termites as well as wood rot in his inspection.
Debbie Albert, PA
Keller Williams of the Treasure Coast