Help! I sent in two phones via UPS in Verizon's packaging with weigh bills - only 1 of them was received by Verizon. The other was never received. Both were put in the same drop box at the same time. Now Verizon is charging me $750!! They have NOT been helpful on the phone about this issue. They say they are "looking for it" but I just saw the charge on my bill! Help!