Non Profit Step 3 does not work

It is April and I just tried registering my non-profit yesterday and the step 3 is still broken. There are different posts on this dating back to November. 
Surely somebody at Microsoft is responsible for maintaining this form?
I am a business customer of M365 as well and am raising a support ticket that way but the support agent I am dealing with is very confused by the whole situation. One issue is that my business and non-profit are different entities but the only way to contact support is if you already have a business M365 account!

The whole situation is so frustrating, can somebody at Microsoft please escalate this so the relevant responsible engineer can be found and the page fixed.

Also I have only tried registering with a regular cell phone number, not VOIP or landline.