This forum is meant for poker related bugs only.
But since we are at it, if you really think the slot malfunctioned, you should contact your local live chat support about it.
I'm 99% positive ( and that's being generous ) that you have misunderstood something about the slot payout mechanics though, but it's impossible to try to help you out with the non-existing information you gave about what it exactly is that didn't go as you expected.
Probably worth it for you to have a closer look on that slots rules, information, payout lines etc. also...