Newsletter received twice after updating e-mail adress

Hello altogether,

I've updated my e-mail adresse a while ago. This then, I'm receiving my subscribed newsletters twice, once for the old and onece for the new address.

Please be so kind to let me know, how to unsubscribe the one for my old address.

If you should need more information, please don't hesitate to let me know; even in a private message.

Thank you very much in advance for your support.

Kind regards and have a nice and easy day.