KFC India — money not refunded yet

Address:	Chennai, Tamil Nadu
Website:	online.kfc.co.in

Hi team,
I had ordered food from kfc-omr, chennai branch on 12/09/2018 for an amount of rs.550.
During the card payment, kfc's card-swiping machine turned off and so the kfc representative swiped the card again. Due to this, i was charge twice.
When i informed the branch personnel, he acknowledged the error from his side and i was promised a refund within 7 working days. However, when i checked with him again after 7 days, he said that i'll be receiving the refund after 3 days and so on. I had even sent him the proof of double deduction to his whatsapp as he requested, to carry on with my refund process.
Until this day, i haven't received my refund of rs.550. Requesting you to resolve this issue and pay me the refund amount asap.

Kfc branch : chennai omr