PVR Cinemas — Money payment issue

I yesterday went for a movie in PVR Aerohub tirusulam in chennai .During break time I bought food items worth Rs 240, when I was making through Gpay the payment was successful for me but the PVR staff told payment was not received so I again paid the amount through debit card so the total amount I paid was Rs 480. The staff told me the Remaining Rs 240 will be refunded but money is still not refunded .So please kindly look into this issue and please do the needful.