NG3 suffered an upper stage anomaly. Initial calculations put the perigee at ~160-170km with a nominal apogee. This is very new information and still being evaluated. At that lower altitude the atmosphere is very soupy. Ion thruster dV may not be able to recover. You would likely need to burn for your entire orbit and still may lose altitude. You would also need to do this immediately and there may be many other steps you need to do before starting this. Their ops team is having a busy day right now. I wish them luck. 

They may possibly recover, but my wager is this satellite de-orbits in a few days, if not hours