Yes, a lot of people are. I'm not one of them, so it would be better for you to submit a ticket.
Try switching proxy server to "voip4.freephoneline.ca:6060" without the quotation marks.
Before submitting a ticket, check your ATA settings against these:
viewtopic.php?f=8&t=19934&start=50#p77947.
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Support staff isn’t obliged to read the forums or respond here. It’s best to submit a ticket if you're positive the issue isn't on your end:
https://support.fongo.com/hc/en-us/requests/new.
For ongoing, unresolved issues that can’t be fixed with tickets, customers can submit complaints to CCTS:
https://www.ccts-cprst.ca/. I would give Fongo a week to respond to support request tickets first, at least, unless they've been closed
There's a delay in ticket responses due to COVID-19.
Other places to look for info include
https://status.fongo.com/ (I don't see anything interesting yet) and
https://twitter.com/Fongo_Mobile/with_replies (again, I don't see anything related).
Fongo's service phone number is 647-847-1355. I'm skeptical that anyone is answering calls though, and they don't work on weekends.