How do I get a refund on my TurboTax purchase if I had to file an ammended return in Oregon due to TurboTax's error? I was rejected because it was past the 60 days.

I had put in for the refund once, and was told it wsa past the 60 day satisfaction window.   TurboTax admitted their error well after the 60 days had passed.  I had followed the link given to me by the TurboTax rep I had spoken with.