lacca08

good morning , so I have 2009 Acura TL sh-awd, I just had my alternator changed and upon picking up my car I noticed my keyfob does not work, the battery is fine in the keyfob but it does not lock/unlock the car nor am I able to put the key fob in the key slot and also going to the keyless memory settings it gives me the messages "customization not available until linked to remote"

Ive been trying to Google search how to link remotes but I'm not sure if there is a fix as I am trying to to avoid going to the dealership .