The worst in the world

I do not understand why companies in SA still use eastern berry as one of their collections company. I settled my account and have been calling them for weeks to provide me with a paid up letter. They kept on sending me from pillar to post telling me that I had paid less than the required amount...and my payment confirmation proves them wrong. Someone probably stole the cash..I wouldNt be suprised. One of the ladies even told me to stop calling me because they need to charge me for every communication because they are using up their precious time. Fortunately I keep all evidence and all emails sent and received. I went through their website and actually realised a lot of complaints NEVER even looked at or rep**** to. Where does one find back up to deal with this terrible experience. All I needed was my paid up letter ...I've sent them everything