Telkom sending other people's bill via the app

Horrible, horrible experience with Telkom. Firstly I wanted to get my bill for the month since I haven't received one and when I went to their terrible app, (which doesn't work most of the time) I finally manage to download the bill mind you that, I needed my cell phone number and identity Number in order to get it. Go to my files to check the bill only to find that this is download someone else's whole 7 pages long bill. This is someone's personal information being sent to me. I call the call center and I've been told that, the app has been having issues and it's been worked on. As a service provider, how can you be so reckless as to now be making people's personal information accessible to others via your app. I'm furious, as this is how ***** starts and this is just unacceptable. Telkom needs to do better.