Callcenter Service disappointing

I made an EFT payment towards my account on the 28th of April, I got an sms reminding me to make payment on the 30th which was when I called the Rage Call Centre, I was told that it takes 4 days for the payment to reflect. On the 3rd of May I checked my credit profile and realised that my score had gone down because this my installment to Rage still hadn't gone through, my online statement showed that I now had an overdue balance. I called the Rage Callcenter at 11:22 and I was told to eamil proof of payment which I mmediately did. I had to call the Callcenter again at 15:36 after realising that 5 hours later no one had gotten back to me and there was no change. Only when I called again was I told that the lady I emailed (at 11:22) only just went through her emails and she is now (at 15:40) forwarding my proof of payment to the person responsible. I am in the process of purchasing a car and the last thing I need is to be listed as a late payer because or Rage and it's slow system & *********** employees. Please rectify. I will send a follow up review tomorrow.