Umm why don't I have all the characters I bought some years back

Soso back in 2013 you guys were offering a bundle where you bought all the characters that they had and we're ever going to make I had bought that and uninstalled the game waiting to get a tablet now I reinstalled the game and it's not giving me any of those characters I thought it's really disappointing because I really wanted to play the game

Double-check that you're logged into the Google Play store or iOS Game Center with the same account you used earlier.  Pathfinder uses those accounts to lookup your DLC purchases online and do a few other things like synchronize saves across devices.  It isn't terribly uncommon to get signed out inadvertently during a software upgrade or when setting up a new device.

If that doesn't seem to do the trick, drop support@obsidian.net an email with your PFID (an ID found at the bottom of Pathfinder's Options -> Settings) and they should be able to sort out the problem.