Hi! Welcome to the Samsung Members community.
Before starting the beta, you were informed that you MUST back up your data. Assuming you didn't read this and didn't back up your data? Used for important business, it's surprising you didn't read the beta requirements.
I don't believe there's a way around this—maybe reach out to Samsung directly.
In my opinion you may have to use samsung wallet, and if your bank doesnt support it use the CURVE app to override that.
Info on ui7 beta- you were told
https://eu.community.samsung.com/t5/samsung-lounge/ui7-beta-information/td-p/11870545?src=ShareByUse...This wasnt hidden, it was in large text on the update screen
"* We recommend that you back up your important data to keep it safe from any unexpected errors that may occur while using Beta software or during upgrades."