Proof of payment help

I have phoned Rain on Monday to confirm my monthly amount of R625 was paid after my account was shown as overdue. The lady I talked to said the payment isn't showing on their side. I went to my bank Monday afternoon and they confirmed the payment does show. I phoned again on Tuesday and talked to a very rude gentleman (Jamal) who said to sent proof of payment to the email address '***'. I did sent the email Tuesday, and Wednesday again, with no reply. This morning I went onto my account at Raingo and asked for the email address to sent my proof of payment (***), and still haven't received any reply. The lady I spoke to on Monday changed my account as 'promise to pay' with the first amount being deducted tomorrow. But I have paid the 27th, and it is shown on my statement. I need this sorted please.