Poor service

I have Wifi with DSTV but what has happend lately I really feel ********** and did not get service I payed for. My data got depleted without even being loaded worse of all I work from home, i attend meetings all that needs DATA. I haven't been at home for 3 weeks so my data was off when I come after few days this is what I find. There is no way I could have finished 25 Gigs in days less than a week