Billing nightmare

I moved into the complex where I’m staying in March, I paid the R1300 required by RMS of which R500 goes towards my utility bill. From then I’ve been recharging my power properly. I was not home since the lockdown began,so I wouldn’t have used much of what I recharged for that month. Fast forward to May,I recharged with R100 as I had R49 left. I recharged on the 5th May ,I was still not home till the 15th May. 23rd May I receive an SMS saying I’m left with R12, I then recharged R300 on the 25th May. 31st May I check my balance it was on R230, I manage my usage every 2 days. 1 June I get an sms saying I’m left with R22 which honestly doesn’t make sense how all that money can disappear in 1 night. I then called the call centre to advise them of this, they told me I was on a -R150 or something along those lines. Which clearly doesn’t make sense how so and for which month that minus is for cause my bill is never on negative and I’ve only been there for 3 months recharging as per normal. The agent the says I wasn’t sent an sms advising of the minus because they have a system issue(how convenient) I then sent them an email with all the information they would send me of my balances, i only get a response telling me “check your dashboard online” (how professional)!!! This company is not but a ***** and you guys make it very hard for tenants to enjoy their stay at complexes because we honestly get **********. How R230 vanished overnight is beyond me. To date no one has the audacity to at least call and explain what happened and take responsibility for your errors. You are lucky if you even get a response cause their customer service is very very very POOR! I’m appalled