Some details here:

https://www.dslreports.com/forum/r32512300-Voip-ms-Hacked-Voip-ms-accounts

If you use voip.ms, then disable automatic creditcard billing, disable international calling, set very short maximum call durations, and change all passwords (again!).

They did send out a note back in May suggesting people change passwords, but they seem to have leaked them all again since then.

Anyone know of similar alternative services?