Customer service agent didn't know her jon

Called cells customer care centre because I was getting **********,my airtime kept on disappearing with a day of purchase.Called the customer service line and spoke to an agent named Nonhlanhla and instead of her trying to help she kept and trying to say my phone uses both data and airtime simultaneously when I'm using my apps,asked her then what's the use of buying cell c data If it will still use my airtime she didn't have a response but kept on repeating herself till she hung up...bad service at its best,worst network with even worse agents...