mySMTP has various support and contact options.

Email: This email address is being protected from spambots. You need JavaScript enabled to view it.
Chat: via mysmtp.com
Teams: 
WhatsApp:: +4520880880
Email form: https://mysmtp.com/contact/talk-to-us

Make sure to bookmark https://status.mysmtp.com/ for any status messages and service window announcements.