@Ryan3355 It's not a lie- Customer service cannot change your reservation. It's completely up to your host, who also controls prices, so even if CS could change it, they can't dictate the price to your host.
Why did you not contact the host? That's how this works.
CS also cannot (although they sometimes do) issue a refund without the host's permission.
I'm not sure what you're trying to do here, but everything that has happened so far is according to the rules. If you need to change the reservation, contact the host. Some will work with you, some won't. It could be that their calendar is blocked for the dates you want to switch to, or there may be many other reasons they can or cannot accommodate you.
Also, outside of the host's cancellation policy, there is a 48 hour window after which AirBnB will take their fees, even if the host allows you to cancel.
It's important to pay attention to the details when you make a booking. Not knowing all the details of your booking, I can't comment further, but what I've told you here is factual.