Worst service ever

I have sent countless emails to I dont know how many people already and have gotten no responce. Its like they are purposefully ignoring me now. They took my phone in for repairs after waiting almost 3 weeks then took another 3 weeks to fix saying it is going through quality test. The phone comes back with new problems. How do you understand that. My phone is not even a year old and still under warranty so its simple I want a new phone. I refuse to pay and wait again forever to get service which im paying for. I have also started legal action.