Almost complete rewrite of callback script
[fix] Domains not registering and modules not setting up
[fix] Credit adding up without any reason
[fix] Credit not deducting from account if there is
[fix] Messing up domain and module expiry dates
[del] Admin privileges - completely unnessecary
...
PROFIT!
[note] Never write code-monkey style code if you can do the same and even better with API.