Domino's Pizza — Delay in delivery and substandard product

A medium chicken dominator was ordered. Price being 525 (without tax) on which a 50% discount coupon was applied.
The order was placed at 10:06 PM and delivery was at 11:30 PM, after it was said that it would be delivered in 45-50 mins. A call was made at 10:55 to enquire about the pizza, to which they said it would reach in 5-10 mins. That did not happen, and I was forced to call again after 20 mins.
On receiving the product, I noticed that it was cold, stale and seemed of substandard quality. The taste was different from previous ties as well.
Very disappointed after receiving such horrible service, being a regular customer.