Extremely bad service

I placed an order with Avon in September & I paid for it on 01/10/2020 R539. 10 but I did not notice that my refence number was wrong. On the 23rd if October I received an sms reminding me of payment but because I know I paid I ignored it. On the 27th of October I received another sms so I decided to email credit control.sa. I received a reference number and it took them 4 days to respond to me. Initially I had attached a copy of my transaction history but then they requested proof of payment.

So fast forward to when I informed the agent and sent the correct proof of payment. I got an email confirming receipt of my pop on 0411/2020. The agent was able to get my October order through but I was invoiced R1238. 90 which includes the R539.1 that I paid for already in October.

When I enquired this with the agent she said it takes 14 days to do a joural, which surprises me because I also work in a finance department and knowing the function it doesn't need to take that long.

But anyway this morning I received another sms saying that I'm being charged R50. 00 for not paying my account.

I have not received feedback regarding my query and I find it unacceptable that I'm being charged interest after I receive acknowledgement of proof of payment. At this moment I am considering paying for this order & it will be the last time I sell your products & if I find that this has affected my credit score or that I'm black listed I'm taking you to the Ombudsman.