1) Why did the pages get unpublished?
2) What recovery steps have you taken?
3) What niches are these pages about?
If they're political pages then you can't do much more to recover them via appeal to the facebook staff.
But, if you're 100% confident that those pages didn't break any FB TOS you could hire a lawyer to send them a letter inquiring the specific reasons or TOS that those pages broke. FB are obliged in that case to provide the specific reasons for unpublishing those pages. If the reasons are bogus you have a chance at winning a court case which would mean recovery of those pages + settlement/compensation money.