Auto repair service near Maquoketa, IA

I am SO mad at myself for taking my 2011 Chevy tuck to this moron to have my new Tekonsha brake controller put on it. After being told that he was going to charge me "150-$175 to do this seemingly minor job to hook up FOUR wires on my truck I set up an appointment 4 days in advance and went there. The day took my truck to him I took the time to solder longer leads onto the short Tekonsha harness, because the directions clearly stated to use 12 gauge wires for it and to "HOOK UP THE BLACK AND WHITE WIRES DIRECTLY TO THE BATTERY", and I didn't want any crappy "crimp-on" terminals used on my truck. No joke - after screwing around for over two HOURS under the dash I asked him if he had run the wires through the firewall yet and ye told me he "found a place under the dash to hook them up"!!!! UNDER THE DASH - A 30 AMP CIRCUIT?? So then he set out to run the ONE blue wire to that back of the truck and after (seriously) ANOTHER 2 hours and over 30 minutes he finally got done with the 90 minute job. Regretfully this new controller didn't fix the problem with my trailer's brakes and I do NOT hold him responsible for that, BUT now I have to take it to yet ANOTHER shop to fix his moron employee's screw up of hooking up a 30 amp circuit under my truck's dash, so I'll have a total of $300 into this 4-wire wiring job!!!!!