MTN not advising customer of deactivation of sim cards

Good day

Just got off the phone with an MTN advisor, my MTN sim has been deactivated. Without warning nothing. She asked me when the last time was I used the phone, I used the phone on a daily, but no, when last did I make a call or add airtime. I don't know.

Then she tells me if I knew I wasn't going to use the number I had to let them know. I did not know if you don't use your number within 90 days it gets deactivated, then she tells me I need to let them know, they don't make calls or send out sms to customers????

WTH?

And apparently I cannot get my number back as it has been recycled?

I am surely not going to make use of MTN ever again.

And now that I know I must use the phone constantly in order to keep the number, I'll surely do so with our new service provider