Poor Delivery from Mr Delivery

4 hours later, I still don't have the "coupon" from Mr Delivery despite 5 calls to the customer service agents. The agents are rude, and keep promising to email the "coupon" yet ... where is it then? The customer service agents are clearly NOT trained to deal with complaints, nor are they trained or adept at sending simple emails, it seems. Its clear, that the restaurant made a mistake, yet Mr D is held liable for non delivery of said item I paid for via their app. The fact is, they make YOU as the customer feel that it was somehow your fault. I'm confused. I asked for a copy of the sent receipt of said "coupon" but they refuse to answer or send it. It's not in my junk folder, before your agents get smart with me again. Really ? Over a large fries, which left my daughter in tears at lunch time. Time to re-think my options.