Disappointed in Puma Soccer Boots

I'd like to review a product I recently purchased. It's the Puma Ultra 5 FG/AG soccer boots. They've added a very strange design at the heel, some sort of cushioning that is not, in my opinion, conforming to the normal shape of a foot. It's causing extreme blisters at the heel and pain after less than 30 minutes of play. I've already used it a few times as I was hoping it would get better, but there has been no improvement after a few hours of pain. It such a bad thing, because my previous Puma boots was insanely good, had them for two years and it was exceptional. So I don't know what is wrong with this new design, but I think I've used it too many times to return them.