No, there is no phone number. I doubt they would ever try to staff a global phone line and it would be really expensive, so I’d sure rather see them use those funds for more critical things. Support usually answers within 24 hours, sometimes 48.
If you got an instantly blocked account you must have either repeatedly violated the ToS, received multiple warnings, or you did something that is considered a massive violation. My best guess is that you sent an empty deliver and it wasn’t the first time, but I have no way of knowing. Regardless, Fiverr will return your funds to you if they decide that they were earned in a valid way.
There is usually a 90 day waiting period to get funds on a blocked account. So, even if they had a phone number this wouldn’t be a quick resolution in most cases. The good news is that usually there isn’t a big issue with getting your funds later on.
Edited to add - I notice that you first reported problems on the forum 6 days ago so Support must have been in touch with you in some way. Just as a side note to anyone else reading, if you are having major issues over 6 days, ask for extensions on any active orders. Buyers are usually very good about giving extensions and it is far better than risking a problem that escalates like this.