Seller taking his time and long after contract period

[Sami Gren]

Hi, I'm in contract on a multi-family house and it is already more than 3 month - that's much longer than the 60-day contract we have. 

And I can't close because the seller still has to get done a few things, he claims that he is trying to do it and  nothing in his hands to make it go faster but I highly doubt that and it's taking way way too long, my lawyer claims that there's nothing he can do on his I end, I'm wondering if it is really so (because he doesn't really sound too experienced)