When you say it sees it as "Filesystem type: msdos" I am assuming you are NOT using a windows PC. Possibly a MAC or Linux box ? Pretty sure that is NOT an official filesyste type. And whatever machines you are using, is grouping all windows type filesystems under 1 category (FAT, FAT32, exFAT, NTFS, etc..). If you have access to a windows PC use that.
I would have offered to send you a MicroSD card, since I have a few of them (8GB) which I used to update some for family and friends. And with your comment about "Cretin" I assume we are not too far geographically But after all the current comments, I am not even going to bother.
For a company which has a reputation of regular updates, it should have been a red flag to you when you realized that after 6 months, still no updates. Can't blame buzz, if you waited more than a year to check confirm why you still had no updates. And just to clarify, they did not tell you to "buzz" off. They did offer to flash it, but being so long after the fact, and out of warranty they would not cover the shipping. They would not charge you for the service, you just cover shipping if you are not able to do it yourself.
Good Luck with the other company you ordered a box from.