@Kevin Rogers very sorry to hear about this news. For transferring the access you can raise a support ticket with Microsoft as you do not have access to the Portal for making changes to the billing and payment console.
Contact the billing team - https://learn.microsoft.com/en-us/azure/azure-portal/supportability/how-to-create-azure-support-request#go-to-help--support-from-the-global-header
Contact the Global Support Number - https://support.microsoft.com/en-us/topic/global-customer-service-phone-numbers-c0389ade-5640-e588-8b0e-28de8afeb3f2
Hope this helps.
JS
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