Hey there, Jacquin Buchanan
If there are no other admins on your tenant, who can reset your account. Please can you submit a support request in for Azure support here: https://azure.microsoft.com/en-us/support/create-ticket/?msockid=012fee8ffecc600a2c82fb63ff776173
You should be able to get this sorted after you confirm your details with the agent. This is so they can prove who you are. If you find that you are unable to submit a support request, please phone support via a phone number for your region listed on this page: https://support.microsoft.com/en-us/topic/global-customer-service-phone-numbers-c0389ade-5640-e588-8b0e-28de8afeb3f2
Hope this helps,
Nathan