When statutory money [salary, leave etc] is owed, the CCMA has no jurisdiction, unless, you refer a dispute for dismissal whereupon they get concurrent jurisdiction with regards to the statutory money.
If you have resigned, the one option is to refer a dispute for constructive dismissal, which, even if your prospects are bit weak, allows you to bring the dispute before a forum that is inexpensive and fairly quick.
Failing which, you can sue out a summons becuase of the contractual nature of the dispute.
You could try small claims court, but, I fear that on many occassions the commisioner, if not experienced in labour will say they have no jurisdiction.