No pro-rata when I wasn't using their internet

Just signed up and didn't start using the fibre because I was out the country and the router that was sent did not have PPPoE details added to the router before sending.

Only found out that we had to manually add the settings on the 16th of the month.

They still have the audacity to charge me for the entire month although I wasn't using their services because of their poor communication.

If the invoice is not being rectified, cancel the service let me go to another service provider.