Hello Dylan Aschoff
Thank you for posting question to Microsoft Q&A Forum.
As the current tag is Microsoft 365 and Office Word for Business MacOS - my assumption is that you would like to upgrade a higher version. You could request a sale callback by accessing this page and click on "Request a sales call"
https://www.microsoft.com/en-us/microsoft-365/business/microsoft-365-plans-and-pricing#section-master-oca0d0

Microsoft Customer Support phone number could also be found here, please access this link and search for your country: https://support.microsoft.com/en-us/topic/customer-service-phone-numbers-c0389ade-5640-e588-8b0e-28de8afeb3f2
In the meantime, for business user - you could also access Microsoft 365 admin center and raise a support ticket so Microsoft Support Team could call you back and guide you with a screen sharing session: Instruction
I hope this information is helpful. Please let me know if you have any further questions.
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