你個 acc 係咪有兩個 payment profile?
我估你 google store default 用嗰個係香港嘅 payment profile
而 google store credit 係喺 us 個 payment profile 到
你要刪咗google store default 嘅 payment profile (我估應該係香港)
之後你先可以用到 us 嘅 payment profile 喺 google store 買嘢
轉到用 us payment profile 先可以用入面 d google store credit