Poor customer service

Reference number is: ********** (acc number) I was in arrears for two months, that is December & January. They said my arrears was R18000. including February installment 2018, on the 15th February R10000 was paid towards this account. Balance of 8000. On the 24th of February R6000 was paid. Balance in arrears R2000. On the 28 February R1000 was paid. Outstanding balance was R1000. On the 3th March R3000 was paid. On the 7th of March R3000 was paid. They later contacted me saying that Im still in arrears with R2900. I then escalated the matter and later I was told to pay R1900 then I'll be up to date with my payments . Which I paid R2100. After I have paid the R2100. I further send an email to the lady who work with account seeking for clarity about the account. I wanted her to tell me after that payment what needs to happen going forward. She did not respond. Yesterday she contacted me and told me about the arrears again of R3000. I further asked clarity about the arrears, she did not respond to my emails. I also emailed Mr Thabo Dlamini their supervisor which he did not respond too.