incorrect awstats for bandwidth useges

hello all,

One of the my client complaining that his site is suspended because of exceed use of bandwidth which is 1.5 G.B. out of1 G.B. But according to awstats he is just using 800 K.B. I already update stats & also ran /scripts/cleanbw, /scripts/runlogsnow
But issue is not resolve. Any one have a suggestion for resolve the issue ?

Thanks in advance,
Sam25