It wasn’t “duplicated” as an EIN. Perhaps it was mistakenly or fraudulently used as an EIN. Maybe your use of the word “duplicated” was why the unhelpful woman insisted you were wrong?
Just because someone used an EIN does not mean they report anything to either SSA or IRS using that EIN.
Did you find any issues on the SSA account? It should show any reported income for all the years, make sure it’s all correct. If it is, I don’t think there’s anything for SSA to do.
Similarly you can view your tax account, request an account transcript, or even call for help (but they get busy around tax time). If you don’t find any problems there, I don’t think there’s anything for IRS to do.
Did you find any issues on the consumer reports? Did you pull ALL OF THEM? If you find something, may be a good idea to treat it like identity theft.
Finally, I’m pretty sure you just have to find the right person at Chase. Whoever was able to figure out that someone was using SSN as EIN should also be able to tell you how to get it fixed.