Did you try private message to moderator, , you can only use code once per account, If you start a new account, you will need another referral code I think.
So each one code can only use once?
A referrer can refer as many times as they like using their one code. The new customer can only take one referral. Then THEY can refer as many as they like afterwards.
Absolutely, you get to use code from referral once, and get to hand yours out till everyone is on Public Mobile