Misleading Advertising

I am a very new senior and when I saw the advert on Panarottis window offering seniors a 20% discount on Wednesdays, I very excitedly decided to take my daughter out for supper. I was going to get take aways bt when I got to the counter, I was informed that the 20% discount only applies for sit down meals. We then decided to sit and proceeded to order our meals, which I would like to add, was delicious. We also received excellent service from our waitron Vuvu. When the time came for the bill to be paid I was informed that the 20% discount is only applicable on my meal and that this does not include the starter and my drinks. Needless to say, I was very disappointed and quite frankly felt that I was misled.