求了解越南的朋友指点

vivaphone 100K 买卡，然后老板给我说直接可以上网，结果很快就欠费。我发了Dkmax去888结果一会又欠费。viva 回复的短信有① Chuc mung! The cao mang den cho Quy Khach co hoi trung MIEN PHI Dien thoai Nokia Lumia 1320 tu VinaPhone. Tra loi cau hoi sau de dang ky tham gia MIEN PHI va tang them diem thuong: Ten nha may loc dau dau tien cua Viet Nam? 1=Dung Quat 2=Nghi Son. Soan 1 hoac 2 gui 1583 (0d)② Tuyet voi! Quy Khach vua duoc tang mon qua dac biet tu the cao may man: Co ngay 50 diem de quay thuong MIEN PHI Dien thoai Nokia Lumia 1320. Tra loi cau hoi de dang ky tham gia MIEN PHI va lay them diem thuong: Tac gia cua bo truyen noi tieng Harry Potter? 1=J.K.Rowling 2=Victor Hugo. Soan 1 hoac 2 gui 1583 (0d)③ Tai khoan chinh cua quy khach sap het. Xin vui long nap the de tiep tuc su dung cac dich vu cua VinaPhone.求解释。如果可以给我说下vivaphone 怎么开流量套餐。无限制就好。谢谢