MTN not knowing what they do

I have been with MTN for a very long time and recently something shocking is happening.Calling the call center is another nightmare because those guys don`t know their own product.For the past 2 months if I load data/airtime is gone within 1min,this calculate to R430 in data and R80 in airtime.I called and spoke to Sinalo Mankaya,said they gonna follow-up and callme make,no feedback Ref no:***8 given.I done a follow-up call and spoke to Katlego,he said he can`t give me a reference but he`ll follow-up as this is under investigation but same ref no will be link to call ,still waiting and meanwhile my data/airtime is taken again.