Worst Customer service.

I've been phoning them for three days now as Im overdue by R43.00 as I apparently missed a payment ,when I ask them to tell me when I missed a payment they say they will let their accounts department phone me in 5 min but no one called. They even can't help me to give their details to pay the overdue amount. Steer clear of them, I really want to complain about their service but I can't as they have no service.