Hi WIMHOF,
First thing I can recommend is to use a password manager for all your accounts, that way you can better-manage all your accounts and passwords including your jsp account, there are some that are plugins for your browsers and there are many great standalone ones too.
Secondly, the only way to recover your account is to use the account recovery feature here:
https://forums.d2jsp.org/recovery.phpTry and provide as much information as possible including your Paypal account information if you've purchased fg on that account before, orbs and stars purchased and used on that account as well as every minor and major detail you may recall for your previous account,
do not be discouraged by the misinformation some of the users above as there are
plenty of accounts sucessful recovered on a monthly basis, the only reason accounts cannot be recovered is if there was suspicious activity with the previous account or if the information was insufficient to indentify you as the owner of the account.
Feel free to PM me if you have any questions!