Hello Sixolise Ruga,
Thanks for your question.
You would need contact the admins of the accounts in question for work or school accounts if you do not have recovery methods.. In this case this will be your School IT admn and they can help reset your MFA creds.
You can also contact the support teams of any applications to assist you in resetting your credentials or reach out to support https://support.microsoft.com/en-us/topic/customer-service-phone-numbers-c0389ade-5640-e588-8b0e-28de8afeb3f2
You can mark it 'Accept Answer' and 'Upvote' if this helped you
Regards,
Abiola