Error with packs and textures downloading

Hi, I was trying to create a new world when the world that I wish to create was inaccessible because it was "dowloading" but I already do it and create worlds with (so I wait and doesnt change, I'm writting after a few days ; doesnt change). I'll try to buy and download new things thats work and are already download, what can I do ? I add two pictures where u can see worlds that are "downloading". Thanks and sorry if it was hard to read, my level of english its to bad.