Kozluk told BBC Radio Sheffield: "The ball came across and I could see that Eastwood was going to stick it in. It hit me in the ribs. I can see a ball mark in my ribs.
"I went over to the linesman and saw him signalling for a penalty. I showed him where the ball had hit my ribs. The referee asked the linesman whether it was a penalty, he said 'I think so'. I told him that it is our livelihoods at stake from a decision like that.
"You can clearly see the ball mark on my ribs. I have never been as distraught after a game in my life. We were a minute away from a four-point gap on Norwich, but we have to pick ourselves up and go out and beat Wolves.
"I hope the referee looks back at that decision because that cost us."