Need my invoice for warranty repair

<p>I recently ordered 2 new s7 edge upgrades join receiving the phones i didn't scrutinize the invoice. Only when 1 phone needed repair i realized it wasn't listed on my invoice. I called vodacom on Tuesday to request the invoice for the second phone and on Friday they emailed me a copy of the invoice i already have which doesn't last the phone in question. I need to repair my phone before the problem gets worse. </p>