Terrible service telkom mobile

On the 6th of June the debit order for my monthly bill was supposed to be deducted as usual. 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.