Losing My Account For No Reason

Riot won't give me my account back that I randomly get locked out of for no reason, after I provide transaction id's, recent gifting, all the passwords, and IGNs, I've had on the account and tell me I don't have enough info to verify I'm the owner just because I can't remember the original email since the original one was from a few years ago and I switched it to one I still use to this day, really good system on how they can take someone's hard work like that and can't even verify I'm the owner with all the transaction id's and even debit card information I've used on it that's really awesome, thanks Riot. Done playing your game if my hours of work can get taken away just like that.