I left a superhosts accommodation after sleeping there overnight after a 6 hr journey. We left as the host upon arrival said they had damp. The listing was also untrue and listed incorrectly. Prior to booking we messaged the host several times regarding the suitability for our elderly arthritic dog. Again the house was completely unsuitable. We spike to the host the nxt day to say we couldn't stay due to thr damp and living accommodation issues. Air bnb keep promising me a half refund but it never happens and they keep delaying the date. I have asked to speak to a supervisor but they never call. How can I escalate this please?