KFC India — Bill not given by the restaurant

Address:

Selaiyur KFC Address: 208A, Velachery Rd, Camp Road Junction, Mahalakshmi Nagar, Selaiyur, Chennai, Tamil Nadu 600073

Hello team,
I have eaten at various KFC outlets, they always provide the printed bill when I decline to provide my mobile number. At Selaiyur(600073) KFC, I ordered a Zinger box, I was asked for my mobile number and I declined to offer my mobile number because I dont have one currently and I dont want to give other people's number. The employee responded to me that I wont be getting a printed bill and an E-bill. They did have paper and printing machine, which they printed a token for me to collect the order(attached, I have blurred name of employee so they wont get scapegoated, get back to me if you want the full image to proceed with the complaint), so they do have the option but they wont give me a bill just because I didn't give them my number.
This seems like a dubious attempt to collect my personal data and not giving me a proper bill, thus forcing me to provide my mobile number.
I used to see boards saying free food if no bill, but I thought a bill was a basic courtesy. Please refund my amount of 1 classic Zinger meal, I dont want to be part of your data collection schemes anymore. I cant even imagine how people without phones or without smartphones, can use your restaurant.