To create, update, and view Support Requests (SRs), PDN registrants (users) must be linked with an account and specifically authorized with one or more support roles. The process of adding a PDN registrant to the list of Support Contacts for an account and granting them a support role is generally referred to as Support Contact Linking. This process may also be referred to as Support Contact Association. Please contact with your Administrators.
Adding to above Susan's points, you would need to get in touch with your Account Administrator. Do you have trouble finding out who the Account Administrator is? We will be unable to reveal that out here on PSC. You can contact Pega Global client Support by referring to the numbers listed here to know this information: Support Contact Information