Worst Customer service from Agent as well as Team Leader

I called into customer service on 2 January 2018 and spoke to Gloria to assist me with my query, she was very rude and spoke over me. I had to shout in order for her to actually give me a chance to speak. Gloria placed me on mute for 5 mins and then she transferred me to the rating service. My call was ended and I am disgusted at the level of service I received from a Vodacom agent Gloria. I was so angry and called back and asked to speak to a Team Leader to raise this concern as this was unacceptable. I spoke to Team Leader Tertius who said he would listen to my call immediately and call me back. To my surprise he called me back but only to tell me that there is issues with the quality system where he must listen to the call. He would come back to me by COB that day. Its 6 days later and still no feedback from this Team leader regarding the query I logged with him. I have requested feedback from him and its unacceptable that a Team Leader also don't call the customers back. Vodacom what's happening that your customers are getting this type of service or should I take my business elsewhere?

Hope someone gets back to me this time and not just ignore my complaint. My contact number is ********** 947.