Domino's Pizza — canceled my order without any reason and still not refunded my money

Address:

Gautam Buddh Nagar, Uttar Pradesh, 201301

Most pathetic service i have everseen.
I ordered pizzas cost of 794/- rs, when i paid through online and after 1 or 2 seconds i recieved a massage that your order has been cancled and you will get your money refunded after 10 days or so and there was no reason mentioned.
I m a pregnant lady and i was having craving and that was the last money with me.
What should i do? I should wait and hold my craving for 10 days, by then dominos will invest my money in share market and get it triplicate and we customer will always be fool like this.
I have called several times to their customer care number but they put me on hold for 10-15 minutes, no reply of emails and tweets.
What should i do???