We have added new price plans on our Premium VPS and Cloud Servers. You can now pay quarterly and semi-annual with huge discount (up to 25%).
If you are already a client and wanted to change your current plan into quarterly or semi-annual payments, just resize your server and select the new plan.
dashboard > manage > resize
The billing is still prorated. The unused days will be credited to your account and you will have a new billing. Make sure you have enough credits in your account when resizing.