Files Disappeared online and on desktop

Hello customer support. Awhile back I had my Box account moved from an old email that i was going to discontinue. It was done successfully and merged. But this morning I woke up and accessed box which I have not done for about a month and ALL the files,folders,docs were gone. Only the new ones that were put on that box account exist. Where are all the others? What was odd is all the files were a white icon and everytime I clicked on them it would want to download, but the would crash. I’m not sure what to do from here. I reinstalled BOX on desktop but that didn’t work. I still don’t see all those old files that were under the previous email. Please advise.