Telkom 8ta disruption of services

I had data SIM cards and contract phone with Telkom ,had to do up grade,I did up grade ,after two weeks my services were disconnected without any communication ,I was told my credit limit was exeded during upgrades ,I must pay R400 for the activation of service ,I am not happy ,Telkom must do better they were suppose to tell me to pay before my services were disrupted, some SIM cards disrupted we're already paid for, my account was debited for data which was loaded for this month now they depriving me data that i have already paid for ,they need to communicate with us as customers