Hey there! Nice to meet you!
An account may be suspended by Microsoft Rewards if a violation of the Microsoft Services Agreement is detected: https://www.microsoft.com/servicesagreement#serviceslist
If you believe your account was suspended in error, the only way to fix this is to contact Microsoft Rewards Support, as they are the only ones who are capable of investigating this case and possibly lifting suspensions: https://rewards.bing.com/support
However, if you are unable to submit a ticket because the form is greyed out, this means that your suspension is permanent and can no longer be appealed.
Thank you for your understanding.
Best regards,
Darhyl