The error on this level has been reported and will likely be fixed when the studio is back at work tomorrow. You can ask customer support to refund your boosters but I'm not sure they will. Good luck.
Hi. I'm sorry you're having this problem. The solution is on the way, but for this you must contact the technical support of the game as indicated in the message that you have put in the image. Thanks and keep enjoying
Hi. Even though the fix is on the way, you need to contact technical support directly from the game. In the "contact us" section Thank you Keep enjoying
Level 8009 has been reported as many Players have had the same issue & we are waiting for a fix from King. This will most likely be available soon this week.