just got disqualified from a tourament with my opponent also for slow play. i didnt know that when the 19mins were up both players were disqualifed. i was pretty far ahead and just about to pot frame ball wen i was disqualified. can the rules not be changed because i deserved to go through?

no

As i've said on pool, the tournament can't wait for players, if we did, tournaments would be "hijacked" so to speak.