Why do we get treated like we *******......

I got airtime with intention to call my sick mom in ZIM but was not able to get through. I tried numerous times with no luck. Then tried once again after an hour n ws told I have insufficient credit. I phoned the call center n spoke to Trevor Mapula who ws telin me how expensive cls are internationally. He told me I had a call that lasted 30 sec which never transpired on my side. I asked for team leader and took the agent 15 to tell me I cnt speak to him he's busy. I asked to leave my details so he cn cal me back n took him another 20min. left my details n now its 3hrs nobody phoned back, i guese the team leader is still busy. what a **** service.