Vumatel's failure to honor commitments and their horrible treatment towards customers

Vumatel received my order number on the 2nd of May 2019 and I have been calling them to activate/ install my line. I missed a day of meetings to honor my appointment which was on the 20th of May 2019 and no one showed up neither was there any communication, I had to follow up and the installation manager **** about knowing anything concerning my appointment despite there being evidence of communication between him and the Vumatel staff via WhatsApp. This is unacceptable and no way to treat clients. I hope no one ever goes through such terrible customer service.