Okcupid Premium Subscription Must Be Canceled Due to Unauthorized Charges

 I just bought this OkCupid Premium membership thing, right? It was supposed to be like 238 Turkish liras for 6 months. But, I only got charged 138 Turkish liras. Anyway, after they took the payment from my card, I realized that they charged me over 1,500 liras more than they were supposed to, so I can't cancel the transaction right now. It would be awesome if you could help me figure out a solution to this problem.  You can usually cancel stuff on Google Play, but for some reason, it's not showing up as an option in this app, leaving me no choice but just advertise it everywhere I can. This is a serious matter. When we make a purchase we also buy aftersales whether it is an online purchase or a physical store object.