<prompt> Human: We were taking my son to daycare twice a week for half days. Daycare was auto-debiting my checking account 75 a week. About a year ago, we called and asked to switch to full days. They okayed it, but never asked us to sign a new contract, and never started charging us more for the switch, continuing to only bill us 75. Fast forward to yesterday, they ran an audit, discovered their mistake, and are now demanding we pay them 1000 to make up for the difference in what they should have been charging us. Do I owe them money for their clerical error? Could they take me to small claims?  <response>: Yes you need to pay them. You have partially paid for the service you received. Im sure you notified them immediately once you realized they werent auto-debiting the correct amount. 