@Galway-House0 interesting..., it seems Airbnb changed a lot after IPO and Covid, just a year ago no AC and no or week wifi would be enough to get a full refund even when it wasn't working for just a few hours.
I have no idea what else you can do.
I suppose you already tried to restart a router? Is the cord long enough to place it somewhere away from other electrical appliances, or somewhere higher and far from any obstacles like walls and massive furniture?
If you plan to stay for another few weeks you can google if there are some digital nomads / tourists internet packages to purchase without a subscription. For example in Croatia is possible to buy a prepaid card, it costs 9€ per week and it is offered to digital nomads. They say they are satisfied with the speed.