Webafrica - worst internet service possible

I'd like to review with NO stars. They have the worst service ever. I ordered internet from them a week ago, paid the connection fee at the same time and now I keep getting notices from Webafrica that they are UNABLE to contact the fibre installer. I want to cancel my order, but there's no way I seem to be able to contact any PERSON. There's no ordinary telephone number, NO e-mail, just bots which don't work. If they are this lax with an installation, they are sure to be terrible with after sales service. How can I cancel my order and get a refund? I cannot afford to wait any longer. I run a business from home and being without internet is proving to be an expensive challenge. I'd like to cancel the order. I'll try elsewhere for faster service.