Unable to book home installation due to broken system

I have ordered Telkom fibre telephonically and was helped by a very competent call centre agent. The next step is booking an appointment for home installation. I received the first link yesterday. The SMS link did not work. A received an email link later, which worked up to a point. There were no dates to select for installation. The call centre informed me that they will raise a ticket to have it addressed with an SLA of 24-48 hours. I insisted to be helped immediately, and were helped by a manager. She did not resolve my issue. This morning I received another email, and could get to where I select a date. Unfortunately, the system failed on submit, and since then I do not get a list of dates to select anymore. It appears as if Vodacom does not see faulty applications and broken online systems as a problem. If they lived up to the word "Customer Service", they would have assisted by contacting me to assist, and ensuring that a date and time is selected from their side. Hopefully Vodacom responds to these complaints of bad service and try and remediate it.