Used seed phrase but still no ravencoin

I was mining awhile back in June/July when the hashrate was low I got about 14k ravencoin which I would like to get back. I was using it on hard drive that took a dump. Now when I tried a few months ago I use the seed phrase but there is no ravencoin balance is 0 why? I mean what’s the point of the seed phrase if nothing is backed up? Seems pointless. Can anyone help me?