You could try contacting androidsupport@imo.im I don't see a web-based FAQ for that app.
If you need additional help or have more questions or details to share, please join the site so you can reply in this thread. See this link for instructions on how to join Android Central.
Bear in mind that your post is fairly meaningless, and not really contributing anything to the discussion, so unlikely to elicit any responses from members.
my imo account number is [mod edit phone number]
but this number i lost 6 month ago with mobile set
i need most important one contract number only have number this imo account