I suggest you report this incident to the exchange party that you use because I believe the exchange party will take full responsibility for that and I think that is the best solution and you should not be too worried because this can be solved even though it takes a long time.
patient because of all the problems I believe there will be a solution.
if the exchange party cannot give you responsibility you can find a hacker who can take your bitcoin back, of course you have to find a very smart hacker.