Game ruined after July 10th update

My whole game my world, my towns my sims my creations are all gone after the update automatically last night around like 8pm now when I open it the game it’s a bunch of random sims in the picture and it says new game, my packs I bought are still exsisting, my mods for sims is still existing, now I’m very sad please fix my game I miss all my sims i made.also the stuff from my gallery not online gallery is all gone too it’s like the game just got rid of everything of mine that I made , especially my sims their all gone the characters I made.