pathetic customer service

Im highly annoyed and disgusted with telkom service ive been trying for almost 2 weeks to change my banking details, everytime i call every agent tells me they cant assist me there system is offline, my new bank has requested to change details however telkom has refused instead of contacting me and confirming the change of banking details thats what a ****ing normal service provider does, my debit order is set to go off tomorrow but if you late with 1 days payment then the laywers call you and threaten you with legal action, so what type of ****ing service is this, its going to cost me bank charges and several calls to get assistance for something that is supposed to be basic assistance with a service provider, what a damn inconvenience, telkom is really a pathethic service provider.