Costa Coffee — no balance or receipt given

I visited the Mumbai international Airport T2 terminal shop (next to bistro) today, 14 th Nov 2017 between 10.40am to 11.35 am. I ordered for a cappuccino and gave the cashier 500 INR. I took the coffee, and forgot the bill and change. I took a seat there and worked for almost 25-30 mins, but the guy never came up with the change on his own. The bill was 237. And I lost 263. Please check your CCTVs for details. I am a short lady, and was wearing a Grey t-shirt. It is not about a nominal amount, it is about your credibility and service. Hoping to hear back. Thank you.
Ms. Tushita Chatterjee
Email id- [protected]@gmail.com