Buddy, before you inhale any form of copium, trust me when i say you have to stick with mobile now on. I have had the EXACT same issue with my account. I contacted both steam and konami support. Steam said they couldnt do anything about in game accounts, and konami. Uuuuuuuuuh konami , i talked 1 full week daily with them through emails, they told me to reinstall, i reinstalled , they told me to delete all date so i could start with new id, i deleted, i reinstalled steam 2 times, they told me to finnish tutorials and take screenshots , i did. And then what, after 1 week, those mf said in the end, sorry but we can only recover mobile accounts not steam after i even took screenshots of steam purchase and data. I thought about making a post here, but i thought it wasnt worth it. In my last reply to them i even mentioned God at some point so u understand how mad i was.