Thanks for contacting us and choosing our product!
We understand your issue with renew license.
However can you send us your current site URL and maybe an admin account for check?
Currently our theme default already 2 columns on mobile: https://prnt.sc/9zytw1PTtgH9
You can check demo site: https://demo.harutheme.com/pangja/shop/
If you customized anything please return it to original and update theme & plugins to the latest version follow this topic: