CalFresh Overpayment- Can I appeal?

So I was receiving cal fresh food stamps for a year and then started working. I stopped using my food stamps as soon as I started working. I didn’t report my income but I just didn’t use any of my benefits. I received a letter saying that my benefits were going to end which I was fine with because I had a job. Fast forward to a year later and I received a notice that I have to pay back and overpayment of issued benefits, because I didn’t report my change in income. But I didn’t even use the CalFresh card. Can I appeal this? Is it a sufficient reason? I’m in Los Angeles county.