Big O Tires Ruined Toyota Big O Tires' negligence trashed my Toyota San Francisco California

On Friday, June 20, I had my 1998 Toyota Corolla towed to your service location.  For almost four years I have been having all my repairs and parts done at Big O.  This time the starter that had been put in only eight months before was faulty, and for some reason the battery was dead.  A new starter and battery were put in.  Then on Wednesday, June 25, I was driving to an orientation for my new job and the oil light went on.  I put some oil in the engine, went to my orientation, and when I went to drive to the new job the engine died with a grinding sound.  I called Triple A, sent the car to Big O and went to my job.  I got a call that the engine was ruined and the radiator cracked: the technician said that “someone” had taken out the oil filter.  Please note “Someone”.  I had not, nor had one else had lifted the hood or touched that car in the past five days.  The mechanic, Mazen, suggested that “someone” had vandalized my vehicle(!).  I spoke to the owner of the franchise and he swore up and down that I couldn’t have driven the car 80 miles in five days if the oil filter had been left out on June 20, and totally and utterly disavowed any responsibility whatsoever for any wrongdoing.  However,  it is blatantly and patently obvious that something had gone wrong: on that make of Toyota, the oil filter must be taken out to access the starter.  Nothing else occurred to that vehicle in those five days between June 20 and June 25.  Big O Tires ruined my Toyota, and because I am an older woman, I was blown off and disregarded, employing both sexism and ageism, just assuming that it could be gotten away with.   They added insult to injury by refusing to buy the car for parts even though I had purchased new tires from them eight months ago and obviously it had a new battery and starter.