Netstar did not debit the payment on the 1st of the month

Netstar did not debit the payment on the 1st of the month. I sent them numerous emails and finally got a response saying my bank account details were wrong no one contacted me in this regard. They asked me to do an EFT payment which I did and sent proof of payment today I get an email saying they are debiting on the 15th. Does no one check first if the payment reflects. Namhla matyolo and tiiseto mafooka both sending emails but communication seems to be a problem