Plesk offers different kinds of support to Plesk 11.x users. In order to find the support options available for your license, find the category, which mentions where you purchased your license, then find the required point depending on what kind of license you have.
NOTE: For support options for Plesk 12 please refer to this article.
Support for direct Plesk customers
The listed support options are for direct Plesk customers (non-partners) who purchased the product directly from Plesk or AWS (Amazon Web Services) Marketplace.
[Free] For customers with a Plesk 11.x Unlimited license on a dedicated server who bought the license directly from Plesk or AWS Marketplace:
24/7/365 email, phone, chat
Support for Plesk Partners:
Partners should use their support codes to contact Plesk technical support. Partner support options vary based on a Partner status. If you need information on support options available for your Partner level, please contact your Sales representative.
Support for customers, who purchased a license from Plesk Partner
If you purchased your Plesk license from a Plesk Partner, you should get support from that provider. Plesk partners are fully trained by Plesk and deliver best-in-the-industry support for Plesk products running on their infrastructure.
Support options available for all owners of a Plesk 11.x license
Self Service Support
You can find all the available online support resources at the Plesk Support page.
You can use the product documentaion, Knowledgebase, find a solution or ask a question on the Plesk Forum. The user community is supported by Plesk Experts, Plesk support staff, and engineering resources.