MHC ARDMORE OKLAHOMA failed to diagnose problem ARDMORE OKLAHOMA

See repair invoice R00463700023133 from your Ardmore, Oklahoma servicing dealer. It will explain the work done on my motorhome. Having no experience on diesel engines I relied on your experienced mechanic (so I thought) to locate and fix my vehicle. I paid this bill in good faith and am now asking for a return of my funds. I was charged as you can see 734.48 which is mostly LABOR. When I got back to New Orleans I immediately brought my motorhome to S&H DIESEL and was told within 30 minutes what the real problem was...….A CRACKED EXHAUST MANIFOLD absolutely nothing to do with air filter or coolant...your mechanic needs to be retrained. I will have S&H diesel forward you a copy of the bill showing what all was done that your mechanic failed to recognize, please call me if you are interested in resolving this matter......A G BUZ L   504 xxx xxxx