Blesta is a good billing system, but the built-in support features are basic. Instead use software dedicated at being the best support help desk possible, with a superior feature set, powerful interface and overall better experience for both users and operators.
Each company within your Blesta installation can be connected to the same SupportPal installation. Each integration can be set to a specific brand if you wish to separate the tickets, departments and self-service content between each Blesta company.
Keep SupportPal and Blesta in sync, the integration will automatically send any new and updated user accounts in Blesta to SupportPal so the same information is stored on both ends.
When a user creates a ticket at your client area, they'll have an option to select a related service, a dropdown populated with all their products from Blesta. This product is then highlighted in the operator ticket view.
Many users may be asking questions that can be easily answered with pre-written articles. Have the option to show users related knowledgebase articles when they're submitting a ticket.