Domino's Pizza — always denied the invoice

Address:

Bangalore, Karnataka

I am never given the bill for my order at dominos outlet, new bel road, bangalore. This is not happened only with me but a lot of my friends too. They often say that they will provide the bill along with the pizza but never do so. On asking for the bill later on, they make excuses of server down or other things.
Ps-this has not happened once but at least 6 times in past 3 weeks.
Kindly do check into the matter.
Thank you.