I was struggling with my MTN router and sim

I was struggling with my MTN router and sim. It didn't want to activate. I called Mondo and as the lady answered, my airtime was up. I got more and called again. Then a man answered, but that's all I could hear. So I called back again. The same lady as the first time answered. I explained that my airtime is low, and asked if they would be able to call me back, should we be cut off. Then she transferred me to another lady that would be able to help. With in about 20 minutes, the problem was solved. I was so excited. Both ladies were so friendly and helpful, although I am sure they could hear my frustration. Thanks so much for a great service. (The first lady is called Heidi, or something close to that. Unfortunately I can't spell the second lady's name)