Charged for use of a brand new installed fibre, that Axxess couldn't activate on their side.

As a brand new customer I am quite surprised at the inequitable service I have experienced. My line was installed on the 11th of January but due to issues on Axxess's side, my line was only activated at around 9pm on the 18th of January. However, I am still being charged for the week while they were trying to sort out my new line. My debit order went off and I reversed it immediately as I am not paying for a new service that hasn't been activated yet. I then simply requested a new amended invoice for the pro-rata use of the line before paying the outstanding amount. This was the response I received... "We do not credit for downtime as we provide the best effort service." What? Is this what you deem customer service? I am now very happy for Axxess to suspend my account so that I can support another ISP.