I was at Antalya airport in February I was that fed up, on my own and bored that paid 18 lira for a Burger King on my credit card which was about 9 pound at the time.
The 'worker' charged 20 lira to my card, when I complained he said sign and I will give you change, couldn't be bothered to argue with someone with rubbish English so just signed it. Could have happily punched him when he gave me my change in Euros.