You can upgrade your reseller account at any time. If you need more disk space or bandwidth beyond the Titanium (highest) level plan, you can purchase a second reseller plan to accommodate your needs.
To upgrade your plan, please submit a support ticket.
You may also purchase additional services through your HostPapa dashboard:
Log in to your HostPapa dashboard: https://www.hostpapa.com/dashboard
Click on My Services.
Click on Add Services.
Need more help? Please open a support ticket here: https://www.hostpapa.com/dashboard
Support ticket tips/info: http://hostpapasupport.com/kb/how-to-open-and-access-support-tickets/