I am an owner of the DJI Mini 3 Pro,
Is there anyone else having this problem  I have attempted many many times to change my firmware to 0700 but it seems impossible.  DJI tell me that I can only update to the latest firmware 0900 which in my opinion is extremely unfair.

Hi! You might be better off posting your question in the 'products' section of this forum.  That is way more active.    -   https://forum.dji.com/forum-129-1.html

Do you have the RC, or are you using your phone?