I'm sorry. I left my crystal ball at work.

You didn't tell us what model, variant or any details, apart from you drive a liberty, and that you got rear ended!

Regardless, take it back to the repairer immediately and demand that they repair it properly. Explain to them your symptoms.

If you find that they palm you off, contact your insurance company, explaining it to them of the situation, and demand that it is inspected and repaired.

Vehicular repairs aren't just panels and aesthetics. They're obliged to repair malfunctioning components too, as a result of accident damage.

Definitely take it back.
Im in the process of taking mine back for the third time after they keep getting it wrong
You are the customer and until you're happy, you should be letting them know about it.