Poor service from Vodacom

My fibre installation was confirmed for the 18th March. Installer came out 2.5hrs late and said there is not enough time to complete the installation, and we confirmed an appointment for the coming Friday. He never pitched and I have been on the phone with Vodacom for 7 consecutive business days, and cannot get confirmation of an installation date. I request for feedback on every call no one bothers to get back to you. I have asked for to speak to a manager or supervisor 3 times and I get told they will call me back. No feedback at all. Vodacom needs to sort their customer service out or we will take our business where it is appreciated. If I do not get feedback by tomorrow,I am cancelling my fibre contract.