Register Viettel account

What is the problem with my phone service provider. Today is the last day I can call with my SIM. I don't know why it block both direction (call and listen). Maybe they want me to register this account. Oh, I must go to a Viettel Agent. It is not near any way. Please don't call me this time, I'm trying my best to fix this problem.
Ah, I've just gotten a happy news from my friend (the one I talked to you before with Nokia N97). He will get his prize next day. Maybe we must celebrate a party. :D