I'm not receiving any points for inviting friends...

I invited 20 friends...

I haven't even received the 2000 points reward for inviting my 20th friend, and I haven't even received the 10,000 points that are supposed to be given for every 10 people😭

I sent an email but there was no response...ㅠㅠ

I've never had anything like this before, so I'm confused😂 What should I do?ㅜㅜ