It's hard to relate, because I wouldn't even know if there are businesses in my area which only use facebook - because I don't use facebook.
I wanted to use a business that wanted me to send them pictures of my drive way via Whatsapp. I ended up taking my business to a different guy, who was able to work with mail. No harm done, everyone is still happy, still no need for Meta products.
Edit: of course I acknowledge that I don't know anything about you or your situation. You maybe really can't work/live without facebook.