Avaya does not sell the IP Office product range directly and so does not provide direct support. Instead, Avaya sells IP Office through a set of distributors and resellers who provide support to their customers and have channels through which they can escalate issues to Avaya if necessary.
If you need to locate a new authorized reseller to support your system:
Visit the Avaya reseller locator page at https://www.avaya.com/en/partner-locator.
Set the Filter option to Small/Medium Business to focus on IP Office resellers.