Captain, unfortunately this is a local case and there are issues related to your ISP.
Here is a standart workaround to fix such issues:
Please check that router/software is not blocking ports 7770, 8089, 5672, 5222, 8080, 21020-21036, 7401-7600 for the game, also turn off all programs which use internet heavily (like torrent programs, netflix clients), disable antivirus, turn off k9 web protection filter or similar to that filters