Etax.com Filed State taxes wrong and now want me to pay back the money. New York New York

I filed my taxes in April 2018 for the previous year (2017) with Etax.com. They said I was owed a refund by the state of Kansas. I printed out the return, submitted it to the state of Kansas, received my refund and that was it....Now almost eight months later I get a letter from The Kansas Dept. of Revenue saying I owe them money because the taxes filed by Etax.com were WRONG. I call Etax.com and guess what? Here's what they said; "Yes we made a mistake but you (meaning I) will have to refund the money to the State of Kansas. So why did I stop doing my taxes myself and start paying Etax.com to do them? It's because they promise that if anything like this ever happens they will take responsibility for their mistakes and pay back money that is owed due to a mistake on their part. Well this is a downright LIE. I will not use them again and you shouldn't either. They actually got down right nasty. I trusted them to do my taxes correctly and they didn't and now I have to pay back money that I don't have because of Etax.com. Stay Away!