Telkom rip-off

So here am I, using Telkom home router. I get 20 GB Inclusive data and 20 GB Night surfer, today it’s the second day of the month since I got my data on the 1st and my 20GB is up. I call the call center to seek assistance because all of this makes no sense to me only to get through to an consultant who tells me that she can’t help me or log a case because it’s showing that I used 15 GB today alone from 10 am until 8pm. As per my Chrome history which I use for the internet, I only used Facebook and Gmail today during the time span she’s giving me. Please tell me which Facebook and Gmail using that amount of data even if left unattended , and you tell me you can’t do anything about that. Even if I had to download 10 movies today alone, this makes no sense how I ****en used 15 GB on checking and sending out emails, status updates and replies. I don’t even finish 1GB on my phone while using Instagram the whole day not to mention other known apps that consumer so much data such a watching YouTube videos. Maybe I’m overreacting or too stupid to believe that I can use that much data connected alone the whole day on my laptop.