The lawyers disinterest in handling the case is probably more like caused by the fact that your father is doing well then you cannot prove your case. If you and/or your father can testify as to how the accident happened and a jury finds you more credible than the other driver they can certainly find in your favor. Look for an experienced personal injury attorney who actually wants to try to help you.
Your father's injuries were serious enough that he should seriously consider filing suit. If he was a passenger, one of the defendants, unfortunately, should be you.
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This is a matter for Canadian law. You will want to contact and probably retain an attorney in Canada to assist you. Try lawyers.com.
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The good news about car collisions in Canada is that generally Canadians carry high liability limit insurance. I would definitely consult another local Canadian attorney before giving up. If you contact me and tell me what province this happened in, I may be able to refer you to a good Canadian personal injury lawyer.
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