They can go to hell

Iv been with the network for over 10 years and today I have experienced the worst by far. R130 of my airtime has mysteriously disappeared within minutes from my phone and even after countless attempts at their call center I have not been assisted even resorted to going to one of their stores only to be told they can't assist me even after providing proof of my airtime pitches with time stamps... I have been unable to use my phone since every time I recharge my airtime disappears