Ordered a jug of lemon lime and bitters soft drink...

Ordered a jug of lemon lime and bitters soft drink and was charged $18!! Another time was charged $9 like a regular soft drink jug (which is still very overpriced for post mix soft drink), and another time told it would be $14 - which is the price of a jug of beer! Not happy with their inconsistent pricings or the manager who was very rude and insisted $18 was the usual price for a soft drink jug despite the price of a glass only being $1 different between LLB ($4.50) & coke ($3.50), not double the price.