Delivery man calling via Whatsapp

My partner and I ordered pizza from Debonairs Pizza in Washington Post at exactly 19:07 and waited for two hours for delivery, when the delivery guy arrived at the gate he contacted my partner via whatsapp (WHICH I FIND VERY INTRUSIVE), when we called him back there was no response. A few minutes later he texts via whatsapp to let us know that he's back at the store and won't be coming back because he tried to call via whatsapp as he didn't have airtime.

I am beyond disgusted with the service and will not be ordering from them again. The delivery guys' name is Junior.