Telkom *****ing money

A month ago i had an issue where telkom had not debited my account for the previous 2 months, this was sorted out after much excuses and so i agreed to pay the large sum accumulated. A day after i got payed this month telkom debited my account for R1,301.45 which is alot of money. Today i receive a message saying i have not payed my account. Confused by this i went to the telkom store where i am told to call the care number, after 2 attempts to get a straight forward answer i am told that the payment was not made, i informed them that i am currently looking at my bank statement while on the phone with them as proof that my account was debited but they insist the payment never went through as i had no funds. how can i not have funds the day after i got paid. On top of this i am told i need to pay the account even though my money was taken!!!!. What the hell, this isn't the first time this has happened as the previous issue stated above was the same except this time telkom took my money and state i haven't paid. I have proof i have so how can i be wrong? this is utterly ridiculous!!!!!!