Call your CC company and initiate a chargeback – Guns of Boom Review

Reading the GoB reviews for 30 seconds tells the whole story: the matching is terrible (particularly after level 34) when you are canon fodder for the clans playing with mics, and you will easily spend >$100 just to remain competitive. There are also numerous bugs that prevent you from using the guns you do buy. The devs don’t care about your complaints and will never refund your money. HOWEVER, when that charge for a new gun hits your credit card, you can call MC, Visa, or whoever, and DECLINE the charge on the grounds that you did not get what you paid for. You get your money back, and if everyone did this the financial pressure on the devs would force them to convert their scam into a reasonable game. $ talks.
Review by GoB-bad on Guns of Boom.