Very very bad service from pulse living in Pretoria

I am very disappointed and angry at this point about how pulse living is handling it's ex tenants. I moved out end of April 2020. With the lockdown in place I was told I was going to receive my final statement which only included the water bill which shows it was (R320) for that month, cleaner fee of R250 and inspection fee of R130. Meaning I was expecting a balance of +- R700 because they water bill was not a fixed amount depends on how you use it. So the company never communicate anything to me no email no sma nothing until they sent me an SMS saying I owe R2887. If I don't pay this is 20 days my account will be sent to credit bureaus. This was the first and only SMS they sent me after I moved out this was on the 12 October 2020 at 16:10. I immediately called the number that was provided in SMS questioning what this amount was for. I was then referred to send an email to query because the lady who handled the accounts didn't understand what this amount was for. After 3dayz they responded the email saying this was for "paint" and the charges I was charged for not paying my balance since April so the interest accumulated. They is a whole email conversation where I ask proof of these charges till today no one is responding me. It's almost over a month with no direct communication of what the R2887 amount is for , they keep mentioning people who should respond to me explaining what the amount is for till today I am waiting . They are not responding my emails anymore since last of last week friday.

Can you please assist I don't know who to contact to get help anymore. I am really upset about how they treat they ex tenants.