I would be happy to help you with this. However, I did not see a $99 payment or upgrade on the account you mentioned. You can view the billing history for your accounts by logging in at WordPress.com and going to Settings > Billing History (Rechnungsverlauf) here:
If you would like to transfer any of your upgrades from one account to another, please log in using the account that currently owns the upgrade and leave a reply in this forum thread to request the transfer.
If you have any questions, please let me know!