Highly disappointed in poor service

I just want to bring to someone's attention that truworths are totally robbing consumers of their hard earned monies I have an account with them and I've been paying my account every month on time and what is expected to be paid. Since September 2019 my installments has been on R180. I made a small purchase in February 2020 just so that my balance can be update to reflect a new installment which at the time was on R1400 which in turn should have made my installments around R140 but yet it was still on R180 and I paid no questions asked. At the end of May my installments went from R180 to R215 which was a shock to me. I emailed their customer service department with n avail, I called them to asked why all they could tell me it's a service fee which was confusing because that is supposed to be apart of your installments. I then decided to just pay R180 which now means I'm in arreas with this R35 service fee. The whole of June 2020 I've been receiving emails and sms's stating I need to pay my account immediately due to this erreas. I received my June statement and now my installments is R245 with a balance of R1000. I've been sending emails on multiple occasions with no feedback from truworths to explain why this is the case. I've even went as far is adding this new watsapp communication to my phone and sent message on that platform with no response. This is highly pathetic and very poor service from this company. I've decided to pay up this R1000 I have with them n closing my account. So I hope I can get an answer to the above but if not just remember you are losing so many customers by the way your company is running. Highly upset and disappointed in your bad service.