Please fix my phone

I have been trying to get my phone fixed (contract).

It stopped working in less than 6 month of purchasing, I was told i needed proof of purchase for them to fix it. I called the center and i was told it will take about a week, I then called after a week and i was told the following day. 3 days after the " following day" i called again, the agent sent it while i was still on the phone (which makes me wonder why was the first agent i spoke to not able to do this?).

I submit the proof of purchase to the repair center and now they want an invoice that i received with the phone. I must call online department to get this invoice.

I have been phoneless for 2 weeks now and it seems i will be going back and forth with this.