Re: Non-fault accident but still "at-fault"
OP, you mention you tried to get resolution with this via the Ombuds person. I assume you are talking about your companies ombuds person? Each company has an Ombuds person, (who is employed by and paid by THAT insurance company).
Your next step, would be to contact the FSCO, (Financial Services Commission of Ontario), they are the government regulators. Explain the circumstances and ask them to look into it.
Now IF they, (FSCO), come back and explain that it is permitted in that, (the other driver's insurance company), are permitted to do this under their underwriting guidelines. Each company offering insurance in Ontario MUST file with the FSCO, their underwriting rules, (basically that insurance companies set of operating rules, IE what lines of insurance they will be offering and under what circumstances etc).
I would point out to the FSCO, that the insurance company, assigning the fault is NOT YOUR insurer and as such, YOU should not be bound by their underwriting guidelines as you are NOT their client. Now, keep in mind your dealing with a bureaucrat, so logical thinking may not be part of the equation..lol Use the example of... It would be like you purchase an item from Walmart, your not satisfied with the products performance and when you go to return it Canadian Tire suddenly shows up and says Walmart won't take it back under their, (Cdn tire), rules...lmao You have NO relationship with Cdn Tire, therefore, Cdn Tire can't enforce their rues on the transaction. Will be interesting to see how they respond to that.