Airtel — illegal termination of amazon prime service by airtel before validity expiry

As an existing airtel broadband customer, under 899 plan (40 mbps, 150gb data per month) i was offered amazon prime subscription which i had activated through the airtel tv app successfully on oct 28th 2018. (I have proof of service activation from amazon)
Around last week of january 2018, i got a mail from amazon saying my prime subscription has been terminated. This was unexpected as amazon prime subscription is valid for a period of 1 year.
Subsequently i raised a mail chain with airtel 121 customer care on feb 8th 2019 seeking clarification as why my service has been illegally terminated??, that too after me activating it from their own app... Through the mail deliberations they were convinced that my service was wrongly terminated (I had attached the proof of activation in the mail chain to support my claim). The complaint number for the same is[protected].
It's march 11th 2019 today and being more than a month airtel has still not provided me with the amazon primeactivation link stating that my plan is not eligible and i need to switch to 999 plan.
My question is if tomorrow this 999 plan becomes ineligible for amazon prime, then will you illegally terminate the valid subscriptions of all the people under the same plan immediately??
This kind o[censored]nprofessional service is not expected from airtel which claims to be the no 1 telecom service provider of india.
I need my service back asap. Please do the needful airtel.