Could a Timing belt that was timed wrong cause my engine to seize.

Why was the timing belt adjusted? That suggests there was a problem that needed attention already. Adjustment is not a normal maintenance item.

Anything done improperly with the timing belt will not cause the engine to seize up. It may stop running but that is not the same thing. If it's really seized up, the cause needs to be determined first before blaming the first shop. If the shop did something wrong, it's unlikely the engine would have run fine for three days. Lack of oil, loss of oil pressure, and a broken internal part will cause the engine to suddenly seize up.