Two differing information provided

I called Vodacom's Collections on Friday 4 Sep after 1pm and spoke to Paul. He adviced that since I had made payment at the back, payment will reflect after 24 hours and in the meanwhile I need to fax or email proof of payment to info he would send via sms. I received the text after the call and accordingly emailed proof of payment around 14h30 on same day. Today is Sunday and the line is still locked and I called again and spoke to Melissa. She tells me payment does not reflect as yet and will only reflect tomorrow, and since I had sent an email