Nobody knows whats going on

I received several automated calls from Cell C customer care saying I must hold on to be transferred to an agent. I hold and the line is then cut and goes dead. They phoned me on all my available numbers. I returned the call and Kwendile at Customer care answered. I explained to her what the problem was but she said she could not help me as she could not see who was calling me. She asked her supervisor to help but was also unsuccessful She said it may have been their sales department or another affiliated partner trying to sell me something! The call lasted 8 min 45 s. What a waste of my time! STOP please.