tow bar installation

Had a tow bar and wiring assembly installed for rv from Honda fit. Had for 1 day and noticed it isnt working properly. No brake lites on honda and left turn signal only working. I paid over $2000 for this and I would expect it to work longer than that. Can you help me and I dont want to spend 3 or 4 days messing with it, please. On installation it took 3 days of car being there for a job they said required 5 hours labor. Help me understand that!!I want it working properly please and I want to watch it done to insure it is done without breaking something else so I wont have to come back every few days. If you can help me let me know. Thank you John L. Shelton 501 366 2829 This was done at crain rv Little rock ar. Dealt primarily with Matt Lee. We paid for this installation to work with our rv (alfa see ya) and it is not working and we were quoated and given a price guaranteed to work with our rv and it does not.