Bad service

i have a contract woth telkom and every single month in the 20th they debit my account and i have never missed a payment because the debit goes through on my pay day. Now for some reason telkom decided to debit earlier in august for the month of july and also did not debit \sept"my acc was in arrears for 2 months which ruined my credit score. Their contact centre is pathetic and unprofeasional"