USELESS ACCOUNT DEPT OF TELKOM

I have 3 mobile contracts , my normal debit order date is on the 5th of each month but on the 26 April my debit order went off my bank , which is not the problem but on the 11 May all 3 phone lines got suspended due to non payment according to them , when we phoned there call centre they said that the debit order of the 26 April does not show on there system and therefor account show in arrears. While the lady was on the phone we forward them the proof of payment where she acknowledge the receipt , according to her she cannot take the suspension off because the system show in arrears , they must first investigate where the funds that went of our bank account is because they cannot pick it up, now because of there USELESS service be without phones and we use our phones for business. Please respond ASAP when payment will show on account and lines be switched back on.