Alternative to port 22? *Possibly of interest to BSNL India (ISP) users*

It seems that BSNL India has blocked access to servers via port 22 in its broadband network since August due to some security issues. This causes ‘Connection timed out on Port 22’ error if you are trying to SSH to your servers. Hoping to check if there’s a workaround for this, or is switching to a new ISP the only solution?