Poor customer service

Firstly I sent an email to make arrangements as I am on maternity leave and waiting for uif payments that I would afford to pay R150 for the month of December , I then received a call regarding my account as it was in arrearsand i made an areangement of R150, however I still received sms stating my account is overdue and need to make payment of R511. Luckily I managed to pay R520 via Eft on the 26th I am now expected to go to the bank to get proof of payment and it is not the first time i make payment via eft, in this hot weather i an expected to go to busy malls with my baby because there is something wrong with your systems this is suchan inconcenience once this issue i solved i am goibg to pay up and close tge account