Domino's Pizza — late delivery of my order and no show by dominos customer service.

My order was 15 minutes late from the guranteed time and when i tried calling on the customer service number it said the number doesn't exist. I tried contacting them through feedbacks but again no replies received. And now on the application they are showing that the order is delivered on time which is not. This is so unprofessional on their part and i don't get this why and how could these people guarantee 30 minutes delivery. Even the delivery guy was rude didn't even apologized for it. If the order is late they gurantee refund and that also didn't happen.