Unreasonable reaction from MTN

This is the weirdest thing I've ever heard about such a big network like MTN🤔 My SIM was blocked without them even contacting me to tell their reasons why. I just saw I can't check my balance nor load data,then I saw no network available 😔 I phoned them and spoken to many people transferring me to different departments and giving me an alternative number to phone, only to told that my SIM is blocked because I don't load airtime or load data. 😱 This number is active for so many years now . What a lame reason to block an active SIM . I trusted MTN so much and now this disappointment. I couldn't access my apps or request an Uber to get home nor could I phone my family. What if something bad had happened to me while stranded with a useless phone? My life was disrupted unnecessarily with no valid reason. How many people are unemployed in this country with cellphones, are their phones also been blocked for that? I'm working and buys data and airtime alot and yet they blocked my number 🤔 T