Would front end damage from an accident cause transmission control issues?

What is your question?

I just took it home from the auto body and repair. The next day when I drove it, upon acceleration from a stop light the engine light came on and was driving sluggish upon acceleration and the engine revs high, doesn't seem to be auto shifting correctly, also don't think the mph odometer is gauging correctly. I feel I should take it back and notify my insurance there is more damage to the engine then initially estimated that needs to be repaired, however, concerned they'll claim it's an unrelated issue.