Processes in Microsoft 365 for setting up Office apps, redeeming product keys, and activating licenses.
Greetings!
This is Tin, sorry to hear that you're experiencing issue while trying to buy MS Office subscription. May I know what is the exact error message that you're getting? Have you tried to use other browser and check if the issue persists? Or how about clearing cache and cookies? To do that, please press CTRL +SHIFT +DEL then choose the Cache also Cookies, then hit Clear Now. If the issue persists, please try to use other device.
Please let me know how it goes.
Thanks,
Tin