Mechanic Job in Jesup, Georgia

I have a 2009 Nissan Altima coupe with a push button start. The steering lock box was faulty on a lot of Nissans in a 4 year range and they offered an extended 6 yr warranty on this part. My boyfriend knows a little about cars so he fixed the box where u could push it with a screwdriver and reset it and the car would start but this only worked for a few wks. Then i broke down and ordered a brand new steering lock box and we put it in and followed the directions for the OBD key programmer to program the key and the car started. It worked for 2 days and now it wont start so we are lost. Praying its something simple but i need someone who can come to the house and run diagnostics