Data disappearing

Hi, 2 months ago I bought a Vodacom sim card for my laptop and every month I load a 5 gig data bundle.<br> Last week I still had more than 5 gigs available, but when I tried to do some work on my laptop last evening, the data had disappeared? What is going on? I had to tell my editor at Beeld this morning that I couldn't do the work he asked me to do last night because more than 5 gigs of data had just vanished! R399 down the drain! This is unacceptable, it really caused me a big headache regarding work and loading important articles on our website.