Pathetic RCS customer service

RCS has the worst customer service I payed R500 into my account and it didn't reflect in my statement. They wanted proof of payment which I provided via email, they acknowledged to have recived the proof of payment but my phone goes to voicemail when they called. I called the customer service a lady picked up and told me she couldn't find my proof of payment and asked me to resend which I did. I called again it was picked up by a male who dropped the phone on me and when I called the third time the system was down.