problem with whmcs offline cc payment
Hi everybody, I'm having issue regarding offline payments.
have no previous experience with whmcs.
I was able to generate invoice, for testing purposes I have entered my credit card credentials, and it appears in unpaid invoices section. After that I have no idea, how it's going to work in real life. how should i proceed this information, how should i pass this info to actual processing center (as i know, i need to get billing service from bank).
If anyone can instruct me in step by step manner, or point to such a link, will be very much appreciated. Thanks in advance.