Understand the idea
Reporting gives a platform information about abuse; blocking limits further contact. Neither requires a public argument with the sender.
Put it into practice
Capture relevant evidence, choose the appropriate report category and block unwanted contact. Review whether your privacy settings allowed the contact.
Know the limits
Do not retaliate by publishing someone’s personal information.
The wider context
Healthy communities make room for questions without pressuring people to spend, disclose personal details or trust strangers. A public profile or invitation link does not certify the people inside a group. Keep account problems in verified support channels and use moderation tools deliberately.
Your next step
Use the practical step above only where it fits your situation. Before an account-specific action, check the current instructions from the service or device provider involved. Write down what you observed and what remains uncertain; that makes a follow-up question more useful.