I just received the decision letter on my FLR(M) extension visa for 30 months (Granted). However, the put me on 10 years route instead of continuing the 5 years route which I got on my first visa 3 years ago

I assume the reason is that I didn't provide an English test!, and I didn't because centres was closed due to Covid19 back in July & June 2020 (in Scotland). The HO Covid19 Contact Centre advised me to submit without the language in a written email and I sent all my papers after submission including my passport.
In Sep/Oct when English centres reopened I wasn't able to take the English test because my Passport was sent to Home Office. And it was required to take the test!
Now, I have no idea what to do to get me back on 5 years route. Already sent an email to admin.review.enquiries@homeoffice.com today and waiting their feedback.
My questions :
1- Anyone faced the same issue?
2- Can I get the English test after the decision made and get me back on 5 years route?
3- What is the best advice you can give to get me back on 5 years route?
Thanks