Received the wrong phone twice, and customer servi...

Received the wrong phone twice, and customer service is the worst I've ever come across. No one has picked up the phone when I tried calling (at different days and different times).

Edit: to clarify - I placed my original order, immediately talked with customer service to upgrade. CS suggested I just pay the difference for the upgrade and they would make a note to send the upgraded package rather than cancelling and placing a new order. First phone received was the one I originally purchased, so I returned it requesting the upgraded device that I paid for. Second phone received was again the same device (all while getting conflicting customer service emails regarding the delays in receiving the phone).