Samsung J1 Ace Sleep of death Issue

<p>I bought my Samsung April 2016. It was working perfectly for 6 months until the sleep of death commenced indefinitely. It was rebooting itself every 15 minutes and then it gave me an error message. I sent it in for repairs in November 2016. It came back seeming fine but 2 months after being supposedly fixed the problem started again. Now it is rebooting itself every 2 minutes. I contacted samsung regarding this issue twice now and they wanted the job card number, but obviously I do not have it anymore as I trusted my Samsung issue days are over - APPARENTLY NOT!!!! I am very unhappy about the quality of this phone. Since when does phones not last more than 6 months??? Also the customer service is beyond pathetic!!! </p>