I'm missing grade 9 and grade 10 marks. Should all hope be lost?

You really should pick your matches & safeties from schools you would actually want to attend (in case you end up at them). It actually takes a lot more work to find those schools than to find reach schools. One thing you will find is that no one can actually answer your question, as it is a very unusual situation and honestly, your explanation for it isn’t all that compelling. You can only count on your high school and GC to help communicate the situation. And as it may hurt your chances, all the more reason why you should make sure you have some matches and safeties you would want to attend. I would not say “hope is lost” as your title so dramatically puts it. But you would be very prudent to make alternate plans you can live with.