I-824

I got my 485 approved and at same time , my kid's I-824 was approved too, anybody know, how long shoud I wait to get some news from Guangshou.
I just wonder, I can;t contact the Guangzhou, I have to purchase phone call time, I put my credit card number to buy, nothing happened, no PIN feedback to my email, I am so frustrated. I don;t know what I should say, what I could say, those damn...