I dont have recharge in my Airtel Xstream Fiber but my internet is working what should I do?

Messages
246
Location
Pune
ISP
Airtel, Tata Sky
I asked them to upgrade my connection to 1 Gig and it is been in progress for the past week. The call centre said it is due to a 'cable issue'. My connection remains stuck at 300 Mbps and I am unable to renew my connection as the plan change has not occured yet. Oh well, it's been working without any payment the prepaid subs expired on the 10th.
 
Messages
523
Location
Barabanki
ISP
Airtel Xstream Fiber (1Gbps)
Jio Fiber (150Mbps)
I didn't recharge airtel this month because I wasnt going to be at my apartment, yesterday I came back to apartment and as a surprise, airtel was working with 1Gbps up and down, though in airtel app, it is saying 0 Validity 0 Balance. Today is 1 complete month after recharge finished.