The following steps will guide you updating the primary contact for your supplier:
At the top, click the Admin Cogs
icon.Click Suppliers, Manage Suppliers, then select the supplier required by clicking on the name.
Scroll down to the Primary Contact section and click Edit.
Click Create New Contact.
Type the details for the contact.
Untick the user not required from Purchaser Sites and click Update to save changes.
Select the supplier contact required.
Select the Site required and click Update to save any changes.
If the users do not have the permissions to access this area, they can liaise with their Head Office or Procurement Team for assistance.