I have an ongoing case, I cannot receive calls after my sim was switched to prepaid after I cancelled my subscription. (The person calling hears a message saying "This number does not exist".)

I can call people but they can not call me.

I was told (by you) to charge my card with money, because it was locked, which was not the case because I was still receiving texts.
Now that I have money on my card, it’s still not working and I’ve wasted my money.

Please give me a real solution. And do call my number before telling me it works, thank you.