A customizable group messaging space within the GroupMe app, designed for seamless communication among friends, classmates, teams, or communities.
Sorry to hear you're having trouble.
However, I'm afraid that as this is an open forum no one here would be able to help with this issue. Your best bet would be to continue dealing with GroupMe Support by following the instructions at this link https://support.microsoft.com/en-us/groupme/how-do-i-contact-groupme-customer-services.