IssaRS4cuh

This might take a minute sorry i appreciate your time. . So I recently just purchased a 08 rs4 a few months back and a couple weeks ago I decided to take it to a shop to put a sub and a amplifier in the back because I don't really think the stock system on it sound very good to be honest. I'm not a bass freak. It just sounded horrible and I guess i like balance? I actually have the bass turned all the way down in my phone and my stereo. And it's just about right. But anyway long story short I noticed my navigation system is completely thrown off. It shows the arrow that supposedly represents me but its not even on a road nor showing and roads or street names at all and It don't even know where tf it is or where I'm at. I'm planning on taking a trip to Los Angeles soon from Oregon and I really need help getting it fixed!! I can assure you this is not where I live.