Hello,
2) try to add the custom Bootstrap class text-center
for the element or column where it’s located
3) All the payment options are related to WooCommerce plugin (WooCommerce > Settings > Payments), our theme does not have any additional settings for it. Maybe choose the Direct bank transfer payment method and change the related tests to something like “submit request” or anything that will be suitable for you http://prntscr.com/q2a3yf
Regards