RIPPOFF IN PAYMENTS

I received a SMS with a payment link and on 26 October 2023 a payment was made as per there payment portal with the amount given, now after a week of activation my services were disconnected and I am been told that I was in arrears with R699. why was the arrears monies not included in the due amount on the SMS notification, but rather disconnect my services. Meaning I paid NOW over a thousand rand to be switched of again so what did I pay for.