I echo a lot of the advice given above, but want to reemphasize @2020PhD's point about your GRE quant scores not being higher for someone who is good at math. I'm surprised more people haven't commented on it. The GRE quant section should be very basic for someone who is mathematically inclined. Doing well on it does not mean you are guaranteed admissions in graduate level math or math-adjacent programs, but doing poorly on is likely to be a red flag to adcomms.
I sincerely hope you get into at least one of your remaining programs. On the off chance you didn't, this may be a good opportunity for you to take a break and rethink your goals. Going to graduate school this year may not be the best idea with the pandemic going on anyway. If it turns out you want to reapply in the future, there may be other aspects of your application that could be improved, like:
You mention the success of these professors but not their relationship to you. Do they know you well enough to write about your work? What is the relevance of having the former director of education in your country write a reference for you?
Good luck mate.