Metro by T-Mobile

I purchased a Samaung Galaxy J7 Prime cell phone from the Metro PCs store located at 3276 Buford Drive in Buford Ga on Dec. 19, 2017. I did not experience and issues until August 2018., when I proceeded to make a call and the entire screen went black and completely unresponsive. The phone had not been damaged or dropped, nor loaned out to anyone. i was the only user of this cell phone. After the phone went black I was unable to use the cell phone. The next day I took the phone into the Alpharetta, Ga location for assistance. The Metro rep told me that the phone had malfunction due to a manufacturer defect. The rep said that the only option I had was to pay $30 for a replacement phone or $15 if I left the phone and Metro will send the phone in to Samsung for an exchange. I declined these options because I needed the data and contact information retrieved. I contacted Samsung no resolution, failed to honor refund warranty.