how to delete current child theme and create new to start everything from scrach

Hello,

Thank you for your question! We appreciate you reaching out to us.

First of all, navigate to Appearance -> Themes, and delete the child theme.

https://monosnap.com/file/YFg1g7mro2oIbldeGrhig9c5QRx0Pb

After that you need to download the archive of our theme from the Envato market, in the archive itself is an actual child theme so upload it from there to your WordPress.

I hope this helps!

Kind Regards