Terrible service from Telkom Mobile

On the 6th of June the debit order for the bill was deducted. The transaction was reversed even though there was more than enough funds. I went online and did a credit card payment online. I keep on receiving sms's that my account is in arrears even though I paid online on 6 June 2019. I received a voice tonight 14 June 2019 to say my account is in arrears and my services will be suspended. I have been a loyal customer for years and has never failed to pay a single bill. This is unacceptable and terrible service.