Maybe try calling your embassy and asking what would be best for the situation? They might let you use a different reference seeing as a remote teacher wouldn't make for a very honest or detailed one. I'm sure you're not the first person who has had this issue, so they might have some experience with what to do
I'm glad I don't need a uni reference, I didn't show up to enough of my classes to really get to know any of my lecturers >_>