1. Contact Dr. Umesh Chandra Shastri directly via email or phone.
2. Provide details of the Bhagwat event, such as date, venue, timings, etc.
3. Explain why you would like to invite him and what you expect from him.
4. Make sure to provide details of the remuneration and any other relevant details.
5. Acknowledge his response and confirm the event details.
6. Send a formal invitation letter to his address, either via mail or email.