mcsilks

Hello, I have a query. Is it normal for a company to ban an account as that account has been regularly winning and is up to the tune of 3~4K over a 2-year period? My Paddy Power account has been stopped and they have told me that the country where I live is restricted despite it being in the unrestricted list? All of my friends in Japan can still use their accounts as per usual, but they tell me that my account is no longer allowed. Surely this is just wrong? Can they do this? Many thanks