Why do you need to do a data recovery anyway? Did you accidentally throw away a piece of gear? Unless it is a truly unique piece of gear from say version 1.0 that is now unatainable you're better off just getting a new one through the Calamity Salvager (such as previous tiers of relic weapons) or aquiring more tomes to buy it if it's end game stuff, and not wasting your one-time-only item restoration on something you can reattain normally in the game anyway.

If there is a bug or technical issue preventing you from accessing the game, then a data rollback will not help you (as that only affects your character data not how you access the game). Try reinstalling the game or upgrading your system. SE staff are, like the majority of the world's population, now working remotely from home, and they've stated that they have issues with access (trying to get it all set up is the reason why there was a significant delay in content last year). Try and have a little understanding on the situation on their side of the fence - that's not to say your issue is not important or deserving of resolution. It's just that there are a lot of complexities that can drag out resolving such issues. Keeping a cooler head is probably a better choice at this time.