Hi,
In this case you will have to raise a support case with MS - https://learn.microsoft.com/en-us/azure/azure-portal/supportability/how-to-create-azure-support-request#go-to-help--support-from-the-global-header also you can contact them via the local Global numbers - https://support.microsoft.com/en-us/topic/global-customer-service-phone-numbers-c0389ade-5640-e588-8b0e-28de8afeb3f2
Just keep identity and proof of the tenant ownership and billing card handy to prove your relation with the tenant.
Hope this helps.
JS
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