iTunes match won't turn on

On my iMac my iTunes Match won't turn on it says, "You can use iTunes Match on this computer with just one Apple ID every 90 days. You cannot associate this computer with a different Apple ID for 69 days." This is the only Apple ID i have for this computer and I'm very frusterated no one will help me unless i pay $19. I already give Apple enough money for my services. This is so rediculous! PLEASE SOMEONE HELP!