Airtel — no action on my money deducted

Address:

Hyderabad, Andhra Pradesh, 500034

Im an airtel user since 3 years i had seen ad of iphone on emi with downpayment of 7777
So i logged in airtel and ordered an iphone 7 32gb
And paid 7777rs to airtel
But airtel didnt sent the product even on complainting many times no action has been taken i dont want any phone now i just need my money back.
My number is [protected]
When i called customer care they said in 72hrs i'll get my money back
But i didnt got
Then they said it may take 7days
But i didnt
Now they are responsing to my mails
The airtel dosent have any direct calling complaint the worst company i had seen
If i didnt get my money back i'll go legally