Unfortunately, that wasn't true. Other players in the squad put doubts in his minds but according to Brazilian press Piqué didn't try to convince him, he confronted him. As a captain and Catalan idol Piqué did what the fans wanted him to do but that only make Neymar Sr. more certain about his decision. It's better to face a possible UEFA investigation then stay in Barcelona and get booed by the hardcore fans or treated badly around the city. I feel they crossed the point of no return and would be better even for Barça to let him go. Even if that means negotiating some player to help PSG circumvent UEFA's CL. If Neymar doesn't leave now, he'll leave next year.
PS. Not saying Pique shouldn't do that, as I fan I'd expect my captain to do the same. Just explaining that Piqué did not ask him to stay, he confronted him to make a decision ASAP.