Enhanced Complaint Response System and add Complaint section on User Dashboard

[Prateek579]

Problem: Responses will be sent to email addresse both for Existing users and New users.

Solution: Introducing a streamlined complaint handling system:

For Existing Users: Responses will be sent directly to a new section on their dashboard, where they can easily view the solutions to their queries.
For New Users: Responses will be sent to their registered email addresses, ensuring they stay informed and receive timely updates.

[github-actions]

Congratulations, @Prateek579! 🎉 Thank you for creating your issue. Your contribution is greatly appreciated and we look forward to working with you to resolve the issue. Keep up the great work!

We will promptly review your changes and offer feedback. Keep up the excellent work! Kindly remember to check our contributing guidelines