Domino's Pizza — Unethical behaviour

Address:

Ernakulam, Kerala, 682025

I got an sms (Screen shot attached) of 30% discount offer on walk-in / order and walked into dominos palarivattom outlet today (15/08/16).
Though the offer was for walk-in also, the counter staff said "off" is applicable only for online orders.
As i was a frequent buyer from that outlet till my transfer to chennai, i knew there used to be some discount on purchase of every second pizza. He said no such offer exist now.
My order (Bill copy attached) was totalling to rs.1653.44. Since there was an offer of 1 coke/fanta for orders amounting to rs.300 or more if 1 burger pizza is included, i've requested to split my bill as there was 2 burger pizza in my order. Again he refused saying i can't order twice & am authorized only for 1 soft drink for a day. For a moment, i felt like standing at a refugee camp and begging for my daily ration.
While leaving, i've noticed a display about a 50% discount for a second pizza. When i questioned, staff had a discussion and told me that i'm not entitled for that offer as i opted for coke/fanta offer! When i raised my voice, they've returned me rs.293/-.

Anil m b
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[protected]@gmail.com