Reliance Jio Infocomm — Jio Fiber: Charged for a Service not consumed. Partial refund credited

Address:

Ranchi

I had applied for a new Jio Fiber connection for my house. Payment of Rs 1500 was done online.
After successful payment, the jio fiber technician had come for installation. The technician who was sent was a novice and it was his first service he was attending (Got to know later on from other technician colleagues of his). Post-installation of the device the internet service did not come up. However, he said that the issue is from the backend and the internet service will be activated from the backend in 4-5 hours as he has informed in the office. He somehow took the service completion OTP from me assuring that the work has been done and the internet will be active by the evening.
Later after that day raised multiple complaints and followup where I got to know that the issue cannot be resolved and had to raise a disconnection request assuring full amount of Rs 1500 will be refunded to the bank account. The technician had mapped the device id wrongly which cannot be rectified.
Disappointed with no resolution provided, had to raise a disconnection request after 5 days from the date of installation and I was notified that the technician will reach out for the device pickup. However, the appointment got multiple appointments rescheduled messages on my mobile and the device was picked up after a month or so.
There have been multiple calls to the support asking for the status but the supports were useless and had no info.
After a month or so the device got picked up and only Rs 500 was refunded. The rest of Rs 1000 was absorbed by Jio stating that the 30-60 days return policy is not fulfilled. How can they charge a single penny for the service that they were unable to provide?
Also, I feel, The Jio office located here has intentionally not sent their people for device pick within 60 days so that they can loot the consumer. The internet service was not even active from day1. Still, they have looted Rs1000.

PS: I have a few responses/complaints captured in my email communication with the JIO fiber support team. If needed, I can provide validations for the above statements.