Hi there,
Sorry that you’re having trouble with the theme. Anyway have you tried to set the permalink again & then try the pagination. It should work properly. If it’s not working then please provide us a temporary admin access to your site so that we can have a look at it. Also we’d suggest you to update the theme to latest as it comes with different security patches & other fixes. After that if it’s not working please let us know by giving us the access in a private comment here.
Regards