I was driving a tow truck during break up one spring in Prince George and was called out to an older gentleman that had an engine quit on him after an engine service at a well known nation wide chain and when I arrived I hooked up and got it off the road and checked the oil was Nothing on the dipstick and had to take it back to the same shop as per the account that provided the free tow
At the shop was met by the manager who took the gentleman into the waiting area while the shop technician started to dump oil in the crankcase as I was just the driver I couldn’t get involved and felt horrible for the customer and had explained he would probably have to go to court over the damages but wasn’t able to follow up with the customer due to being an outside contractor with no contact info
I believe stuff like this happens regularly
Not saying this is the issue but could be a factor either way your only recourse is usually the court system and you’d be surprised what a negative social media campaign can accomplish
Wish you great success in addressing the situation