Vodacom is *****’s

How is it possible that I am able to use 7.8GB of data between 22:30 to 22:58 without being on my phone because we had guests. I received 3 sms’s at 22:48 that my data went from 4.29GB to 266MB at once, again emphasising that fact that I only received the sms’s without being on my phone. According to Vodacom it was Amazoncloud (I do not have any Amazoncloud what so ever any where) and Telegram ( which was offloaded from my phone because I do not use it at all - have photos to proof it)? This is ****************! Vodacom is *******!