Net Balance

I bought internet yesterday. After 10 min, i got a sms from skitto " you have used 50% of your internet balance". Then after 20 min got another sms " you have used 80% percent of your internet". Then after sometime, i check my data and saw only a few left. So whats wrong skitto? I usually use 1gb pack that price 22 tk for 3 days. And this incident occurring regularly. You take my 22 taka, peomised to give me 1 gb then provide me some mb. Thats it. Yesterday i just watching ban vs zim match on rabbit hole. And turbed of all apps that use internet.