Hallmark Ford, LLC Faulty Repair, Damaged Truck, Refused to Remedy, Accused me of Lying, Lied Themselves Batesville, Mississippi

I had my Ford 2003 F-250 6.0 Diesel repaired at this shop to have a high pressure oil pump replaced.  $2500 and they did not reinstall my aftermarket exhaust correctly.  They refused to fix it and said since it was aftermarket it was not their problem.  This was not a warranty job, this was post warranty, off the street repair.  The exhaust made no noise prior to repair, now it rattles against frame.  They told me to go away and that they would not fix the issue.  They are cheats, liars, and do not appreciate high-paying customers.  This is unacceptable and they should not be trusted for diesel repair.  They do not stand behind their service.