customers suffer because of telkom mobile's messed up billing system

Telkom mobile is failing me as their customer.my data account was put to collection due to bounced debit due to insufficient funds on my side.i mad the payment manually and called the call center to change my collection date to the first to avoid further inconveniences ,the call center agent agreed and and advised that it will be effective after 30 days .after the 30 days nothing has changed on my profile telkom no longer tebits on the set date they decide ti randomly debit and when there are no funds they charge an amount of R290 additional to the invoice for that month.

now i am sitting with their **** of billing system i am clueless when is my debit date and when ever they decide the debit my bank account and if there are no funds i lose both sides my bank charges me and they charge me additional to my monthly bill.

i have tried to resolve the matter about 25 times through their *********** call center agents and seem to hit the wall every-time .i am astonished by their unwillingness to help.they say its a billing department issue and they cant do anything to help me.i cant escalate matter any further and i am sitting with a problem that can not be solved.