Unbelivable pathetic service.

MRRN-96G4J-NGXJ) - Ticket *** I bought a phone, and it stopped working, just dead after less than 4 months. I have sent it back, and I get a message, return not valid, phone is working. Return closed, and it says I must see e-mail. No e-mail. Log a help desk query, no response. WHERE IS MY @^@$% Phone?