Not sure what's going on, seems TM put a temporary stop-gap measure in place by blocking connections on port 22(SSH) heading for 110.159.* IPs.

I had someone enable remote SSH on his DIR-615.
Using the default port 22, I wasn't able to connect from my Streamyx to his Unifi. (connection closed at remote end)

Then I asked him to change the SSH port to a random 5-digit number, and voila I managed to login to router using putty.
Like rizvan said, I was able to use his connection as a SOCKS proxy (ssh dynamic forwarding).

have u guys verified the SMSes are indeed from TM?