Thank you for posting this in Microsoft Q&A. Looks like the subscription was attached to the organization that you left sometime back.
In this situation you will have to contact subscription owner of other organization and get the subscription moved to your new tenant. If this option is not feasible for you then you will have to contact subscription team to get the subscription moved to your new tenant. https://portal.azure.com/?#blade/Microsoft_Azure_Support/HelpAndSupportBlade Let me know if you have any further questions. Please "Accept the answer" if the information helped you. This will help us and others in the community as well.