took out a $500 payday loan, the company took $1500 from my account then

Revoke your ACH authorization first to stop auto debits. Contact your bank. They will help you to do that.
What is the name of the payday loan company? Sounds to be illegal. What state are you in?
If the loan is illegal, then you ought to get a refund.

Yes, for an illegal payday loan, you just have to pay the principal amount. So, do whatever you can to take back your hard-earned money.

Revoke ACH immediately and mail the payday loan company by demanding an explanation to this deduction.

Approach a genuine payday loan debt relief company. They can guide you in a better way. Based on your situation, you might go for settling your payday loan.

If they illegal, then just pay the principal. If legal and you know that you can't repay the whole amount, consider debt settlement service.