Just buy more boosters. After level 2000, it is NOT POSSIBLE to advance without buying boosters. Anyone who says they can is simply lying. No one has done it and that's the reason King makes so much money.
Hi @Stardita, yes players have cleared this level but with all these higher levels boosters are required to clear them. The studio tests the levels before they are released. Players are randomly chosen to test them and they monitor to see how if the players can clear the levels and how long it takes them to do it. Then sometimes they "tweak" a level or two before it's released.