Unfortunately, we cannot change the e-mail address of your Microsoft license. We recommend contacting Microsoft to ask if transferring your license to a different account is possible. You can find the contact information through this link: https://support.microsoft.com/nl-nl/contactus/.
Click on the blue button to start a chat session. You will first receive a few suggestions from Microsoft. If these do not help you, you will eventually be given the option to speak to an employee. Choose this option, then ask an employee if they can help you.