All hosting plans have shell (SSH) access included by default, no requests are needed.
The account username/password can be used to connect via SSH over a special port. Submit a ticket and we'll let you know what port that is.
SSH can be used for SFTP, shell, and other purposes.
You can refer to our documentation to learn about how to log in via SSH: https://tribulant.com/docs/hosting-domains/hosting/10932/logging-in-via-ssh/