I agree, I am having the same problem. I have used up all of my boosters and I still can't do it. I'm not buying anymore. It is a waste of money when you can't get anywhere. Maybe it is time to move on to another game. It's not fun anymore. It is work!
I can't answer this question, but I am having the same problem on the same level. It is impossible to win and I have 55 gold bars that it won't let me use. They want me to buy more and I refuse. This game is getting too expensive and too frustrating. Time to start a new hobby!