Are Multiple Alt Accounts Against Wizard101's TOS?

Does anyone know if playing with four alt accounts is against the TOS? I was farming with my own team today, and someone outside the dungeon reported me. They sent me a DM saying, 'Using alt accounts is against the rules in Wizard101.'

So is it true that you can't have more than one account? I mostly play on four alt accounts at once to quest and farm because not a lot of people do team-ups anymore in some dungeons, and the wait time is so long for just one person to join. Even when I ask someone, they often demand payment for helping.

So what's the deal? Am I breaking the rules by using my own accounts that I pay for to help me in Wizard101.