@Lindsay201 This is a forum for Hosts and Guests to ask questions, exchange info and offer support. No one here has any access to your account and can't do anything about your issue. You need to directly contact Airbnb- contact info can be found in a large pinned post on the first page of this Help forum.
FYI declining a reservation change doesn't mean you've cancelled the original booking- it means you don't agree to the change and want to hold the host to the original booking. You actually have to cancel it, which you cn do penalty-free within 48 hours of booking.