Wish you would have checked other threads concerning this subject, as you would have found your answer there. In short, you will have to submit a ticket to Support telling them you missed any tiles you don't have before exiting the Junglanji Dimension. What happened is everything up to that point was supposed to have been designed so that the player would be forced to dig up every tile, and that way no tile would be left behind, so warning was given because no warning was believed to be necessary. There was a slight flaw, though, and a few tiles were able to be passed over by players. They can't exactly open up the Dimension at this point, though, but they might be able to credit whatever tiles you weren't able to get to your total so you can complete that mine.