The fiber cut is not the same for everyone. Fiber cut resolution time depends upon the local operator and the lineman. Usually, it takes 2-3hrs.
Based on my experience their service is better than other local ISPs. Downtimes are negligible.
The ping issue is mostly resolved now. Most of us are now on the Airtel Patna server.
You can take a 3-month connection. and in the worst case, if you face any issue, just call Airtel Customercare 121 and ask them for disconnection, they will disconnect and refund the money.