What to tell the provider about closed ports?

Question

Computer networks

In general, the current problem is this.
I was not at home for about a month, I returned and the Internet is buggy.
The browser works, skype works on port 443.
Not a single ftp, ssh connection to my servers works.
Youtube video starts with a lag of 30 seconds (the same provider had no such bugs the day before in the neighboring area).
Steam client does not connect (while the internal browser is working).
What did you do. connected directly to macbook. Does not work. Connected directly to pc - does not work.
I connected the phone as a modem - it works everywhere.
Those. The problem is clearly not on my side.
The provider says - that the ports are not closed, everything works, dig around.
What should I do?
UPD.
It so happened that the Internet completely disappeared. And while the Internet was being restored to me remotely, the engineer said that they change IP addresses there, and such things turn out ...

Answer 1

Well, call home specialists from the operator, say that the Internet does not work. As a demonstration, try connecting your browser to an ftp server and send them a screenshot. And also make a trace to the servers you specified with the port specified and throw off the output to them.

Answer 2

Router in use? Then see settings.