bought a duplex from a real estate agent. sq footage was overclaimed 30%, apprasial report erroneously confirms

[Rudy Duran]

unit was occupied both sides of duplex coe. rear unit vacated first week july. front unit vacates in

a few days. just did the measurements with a digital tape measurer., off by 30%, which is huge. House was sold to us by a RE agent. He acted as our buyer's agent as well. Appraisal report complete erroneous. options?