airtel broad band — I am complaining about the refund of rs 1000

Address:	560025
Website:	Airtel Broad Band

Hi sir/madam,

Account #[protected]
Land line #[protected]
Customer application form # tblr7078983
My mobile #[protected]

Above i have provided my details, i am following up with airtel for my refund amount of rs 1000 from march-2016. I have raised several complaints to [protected]@in. Airtel.com and below is the reference numbers they have provided with out any solution.
Mar 24th - reference #65963856,
Apr 6th - reference #66366544,
Apr 20th-reference #66878450,
May 7th - reference #67485870,
On 16th may they responded with out reference number.
Am really frustrated by this, also i don't get proper response when ever i call to the customer care.

Hope you will help me on this.

Regards,
Deepak