Slow to honour agreements

When I first signed up for a washing machine, the agreement said I should go by the delivery date on the product page, which was 14 days. Once the agreement was confirmed, they all of a sudden say I can expect delivery after 45 business days or 30 October. That is 2 months after the order was placed. Every week I get an update stating that they are "prioritising" my order, but they are having trouble securing stock. We are now at 13 November and nothing has changed. Still no ETA, still having trouble with the supplier. Why are the items listed if they are no longer available? Why have they not suggested an alternative yet? They really need to step up and honour customer agreements. It seems this is a norm for them as most of the comments on the Facebook page are about the same thing.