Airtel — applying charges for deactivation of number [protected]

Address:

Pune, Maharashtra, 411057

I have initiated a request on customer care of airtel to de-activate my number ([protected]) on 23rd oct 2017 and they told me that the request has been raised and my number will get de-activated within 7-8 days (I have to pay for these days as well). Now on today (29th oct) when i have called them again to know the status, they told me that no such request has been raised and today they have raised a new request (Req no.[protected] and told me that i have to pay for another 7-8days.
Is this the proper way to work? And the behavior of executive was also very depressing. I am not going to pay for another 7-8days if i have initiated a request on 23rd oct. I have a proof of calling them.

I have found this is the best platform to share my grievances. Please help me on this.