I assume you have a PC. Look in your icon tray at bottom right, open tray < look for the Telcel icon in tray, not the one on your desktop. I think, right click and it opens the original window you have when you start Telcel. In the upper right are words, Internet connection records. Click that and window opens which shows every time and how much you used. The total is at the bottom.
Once you can see these times, things are working and you can get messages. Click the message button to get them. Sign up for mitelcel with stick phone number and get password in a message.