Telkom data ****

I have been a customer for over 6 years now at Telkom and all was fine until today. I woke up this morning to check my account and see if Telkom did recharge my account and to my surprise already between 00:00am and 03:00 I have used 80g, mind you I was asleep by that time but when I checked my telkom portal 80g has already been used😱😱 However when I checked my data usage on my phone setting only 18mg has been used🤷. Tried to check via their app what happened and I can't find an answer 🤬🤬🤬🤬🤬. I sent them a request for an agent to contact me and I hope they will be a better explanation to this ****. Oh while we are on that I also just found out that I subscribed to R500 Showmax thing that I don't know anything about nxa