I broke my site. Help?

[BW3]

I was trying to update my domain (Kajabi) and changed the nameservers in weebly. It didn't work and now my site is down.  I'm trying to change the nameservers back but I can't. I cannot save new nameserver entries in the nameserver section.

Also can you confirm the correct generic nameservers?

Nursesinvesting.com 

[BW3]

I was able to get in touch with weebly support via chat (difficult to find) and they helped restore my nameservers. Here is how to contact support if anyone needs: https://app.squareup.com/help/us/en/contact?panel=FAB456B04971&skip_unit_select=true