Hi
I usually use $45 per month, so I can use 1.5GB.
Last month(December), I paid $60 for using 4GB.
However, I didn't change the plan and just put the $60.
I didn't know that I have to tell somebody to change the plan.
So I couldn't use 4GB, I just used 1.5GB.
And I wanted to use original plan, $45,
and in my balance, there was $15 left,
so I charged just $35 today.
But it doesn't work.
I cannot use calling also data.
What should I do?
Do I have to pay $45?
And was my $15 gone?