Here's what happened to me. I bought a $500 HTC Smartphone from T Mobile that I found was defective, I had to ship it to them so they would send me a replacement, They said the replacement would arrive in maximum 7 days and now its been over 16 days and nothing came, when I called them they said they will file an escalation because they can’t find the defective device I sent (I sent it with UPS and I when I used my tracking number from UPS to check, I found that it arrived to T Mobile on time and they received and a person signed that they received). I called today and they said that it will take 3 days maximum so I can find the result of my escalation and my phone was lost they said they may be able to give me a refund. Now my question is if after the three days I found the phone was lost and they didn’t wanna give me a refund, should I file a lawsuit and try to sue them? Thanks