Pathetic Service from Accounts department.

I am most annoyed with the accounts department as i have had numerous issues with my account not being credited with payments made and decided enough is enough i will close my account and have nothing to do with this company. I have even stopped supporting them. Now i have a new skeleton to deal with, I have made payment to Avon in May 2020 but i am now on credit bureau for this amount. I was declined finance because of Avon/Justine. Enough is enough Avon, send your staff for training or hire more competent staff. I want this matter resolved urgently.