wompi plugin issues

I’m having a hard time trying to integrate credit card payments to my website.
can anybody recomend me any documentation step by step? please.

and transfer from bank to bank are really hard to make it work due to the lack of information. i don’t know what to type on the field named “codigo de clasificacion”. and is it normal to show all my private information to the user for this section? when I set it up and then I tested from the user’s view it shows my bank account and other really sensitive data. I thought that info was kept safe/unexposed.