Bad service from SARS customer care and LIVE CHAT

On Friday Sars called my husband back as he requested a call back. The lady Olga called and then spoke to my wife. She told my wife that we needed to log into Microsoft Edge as Sars is not Google Chrome compatible. My wife told her she was going to download Microsoft Edge on her laptop, but it might take a while. Olga then told her we must call in the morning to speak to an agent to assist us. We called on Saturday only to find Sars call center was closed. Why don't Sars customer care work on a Saturday? Anyway, I started chatting on SARS live chat, This message popped up. "Thank you. You are being connected with a service agent. Please wait. Your estimated wait time is 6 minutes." I am waiting almost 45 now. How long do I still have to wait for someone to assist me? This is very unprofessional from SARS.