@Camille617 Airbnb has over 6,000,000 listings spread throughout 191 countries. They hardly have enough staff to answer a bloody phone, let alone send cleaners into every corner of the world to check for dusty rugs.
If you check in to a home and find that it hasn't been adequately cleaned - regardless of whether you paid a cleaning fee - your first step is to contact the host about the issue. They might propose a resolution, such as to send their own cleaner (or come themselves) to touch up the problem spots. If the host refuses to resolve the issue, you may contact Airbnb to cancel your booking for a refund so that you can relocate.
If a home is habitually left unclean, this tends to be reflected in the reviews - be sure to check those carefully when you're choosing a listing. Airbnb doesn't do home inspections and it never will - if you're among the first guests at a new place, you are the inspector.