*****ing old data, not allocating new data!!!

Second month in a row where 1gig data is not allocated to my phone (Daughter's), and the remaining data from last month is removed!

I'm TIRED of calling and logging service calls! Nobody can provide an answer as to why this is happening, however, you keep doing it!

I pay for the data and expect her remaining data for last month to be returned and her new data allocated accordingly.

How do you take my money but not provide what I pay for?