Domino's Pizza — non deliverance of pizza on time

Address:	Thane, Maharashtra, 400601
Website:	Dominos India

I ordered a chicken dominator pizza with cheese burst base. I received my order after 50 minutes. I complained to the manager and he said he would refund my money as per their policy within a week. I called them after a week as i still did not receive the refund, they said they will call. Neither have they called, nor have they refunded my money. What should i do now?