No way to recover old Roblox account

I have been trying for the last month to recover my old Roblox account with no email or phone number, and a forgotten password. Purchases were made on the account numerous times before but I don’t have the actual receipt or timestamp to prove it, but I do have the cardholder name and approximate dates of purchase made. Even when I send it to Roblox I get an automatic reply saying they can’t help because they need to verify my ownership first? What do they want from me? It’s so annoying and I’ve filed about 10 tickets since