Thanks for the quick reply and helpful tips. I think you're right I may have to just look at a new wallet approach but rather frustrating since I need to prove when fiat deposits were made which I expect will only be visible in that wallet.
Fiat deposits?
How you will prove when fiat deposits were made with bitcoin only wallet (blockchain.info)?
What type of proof bitstamp is asking you? If you want to look at tx history of your wallet than with backup phrase you can import it to electrum, where you can view all of your past tx history.