I was put on hold for 40 minutes and call was cut

I called RCS and spoke to Sikelele. He asked me to hold for 5 minutes. I ended up holding for 40 minutes and he dropped the call. He did not bother to call me back either. Another agent said she can see a note on the system saying he tried calling me back but he did not as i waited 5 minutes for a call back. This is totally unacceptable service. I still have not received an email from him with my statements, neither from the second agent.