Multiple electrical problems after mechanic replaced sunroof and windshield

I had a local mechanic replace sunroof and windshield arrive to no digital or electronic power in side the dash, no gauges work or lights except the check engine light. Other than the wipers constantly going no windows radio, A/C, interior lights etc, no power at all. Car just runs exterior lights are locked on auto mode. Exterior signal lights good. Can't hear or see inside. Help please. What did he do wrong?