time was destroyed and unable to get "the end" achievement fix the game spent a long time just to delete a world

i was playing with a friend we worked to reach the end achieved it but did not get "the end" achievement after beating the dragon tried serveral times to do so but nothing worked logged off and came back the whole file got corrupted and its like time was destroyed in my world things i finished when i started the world where unbuild my farm had land i cleared out on top of it i lost a chest that i recently placed land i removed spawned on top of the everything i build and i lost everything from the end citys so i attempted to go back to the end in hopes of getting the achievement but no luck my world is just a buggy mess now with past and future buildings smashed together this is trash and the whole world is ruined fix the game i lost so much progress the world is just ruined i cant fix a time paradox the whole world just smashed together with my progress and the default world and i still cant get the "the end" achievement ii have picture but its my entire world this is trash and im going to have to erase this entire wolrd