Customer service seems to be a foreign concept

I received an email notification (on 26 June) of maintenance to be done in my building between 1 - 5 July, rendering me without any internet connectivity for an entire week. As someone who works remotely this is an IMMENSE inconvenience. When emailing them asking why alternative solutions, e.g. providing mobile routers at a discounted cost for the week, I was simply told that they "do not offer these options"....?! Because of this utterly useless attempt at 'customer service' I'm left without any WiFi for 5 business days.... affecting not only my work but I'm also unable to listen to music, watch TV etc. Please correct me if I'm wrong, but aren't you an ISP? By that standard should you then not be providing VARIOUS solutions to that end? I.e. when you're busy with maintenance etc. should you not be ensuring that your customers are not left completely disCONNECTED??!