Jio — Jio fiber cancellation Refund Issues

After calling Jio for cancellation for Broadband and Set top box, I was given this cancellation request: SR00001ATT9B. But am unable to track this request anywhere or any details on their devices to be picked up. Tried calling their customer support, but no luck. Very inexperienced call center techs. I read that several people are struggling to get a refund from Jio, and don't get it unless a complaint is raised in consumercomplaints. This is not a good story for a growing company.

Please improve your services to retain customers and do refund my amount asap