Data disappearing a minute after loading it

My daughter's 130MB disappeared literally a minute after loading and checking her WhatsApp messages!!! We called the call centre (110 and 155) and were told to check on the internet the internet sites she had visited. The gentleman would not listen to the fact that my daughter was just about to use the internet- HAD NOT USED IT YET- when the notification came through that the data was depleted. Kindly reimburse my daughter's account