Had a similar scenario myself, my local had a £5 partytime 3x player and I must of pumped player 1 for the best part of £40-50 without going up. I knew the top box was functioning fine as it was taking the other 2 up. Fortunately I know the staff and the engineer in the arcade as I've been going there for so long, I asked them to take a look cause it had never played so bad before, which in fairness they did and it turned out that there was a issue with it and gave me a fiver as compensation which was a bit naff really but just chalked it off as a bad experience.