Debit Fees

I have contract with telkom,since i started using the service provider(telkom) they do not debit monthly fee i have been doing the following every month maybe twice a month but nothing have change,my credit score is decreasing because of telkom

Is not like every month when they try to debit i do not have money they do not debit at all

Some month they switch off my network saying i am not paying. The reason i am not paying is because you are not debiting your fees on my account.. they force me to go to the mall to pay at the stores when i get to the store they tell me to use an app to pay i do not want to use an app or going to the store i want telkom to debit,