Meineke Car Care Center review: Refusal to honor warranty - repair items that did not need repair

My elderly father who speaks limited English went there to repair the muffler on his car. The muffler had a lifetime warranty that the shop refused to honor. The owner told him the car had been in an accident (not true) and he could not honor the warranty. He then changed the story and said the car needed a full tune-up and this is what caused the muffler to get damaged. Bottom line, he tried to rip of my father. I have filed a complaint with Meineke Corp Office, Better Business Bureau, and FL Dept of Agriculture and Consumer Affairs. My father took the car to Midas who repaired it, and told him the car DID NOT NEED a tune up or other repair. Midas in Clearwater FL is UNETHICAL. I would not recommend ANYONE to go there unless you have money to burn.