My recent guest complained about bad smelling from the sewer and they just left after 7 days stay when there was 5 days left of booking. They said that the smell was so disgusting that they could not stay any longer. I came to the house and could feel a minor smell after having flushing in the WC. It is a summer house and none of the neighboors had felt any smell. The sewer from the WC goes to a septic tank and sometimes there can be a smell from the aeration tube when the tank is more than 90% full. The tank was almost empty when the guest came so they must have been flushing 50-60 times per day to make the tank nearly full after 7 days. I will also mention that the booking was for 3 persons but they had invited 4 more people which is not OK.
The guest also behaved badly as they drove there car back and forth on the lawn because they were lazy to walk from the parking place that is only 15 meter from the house. Part of the lawn got damaged and it will cost me money and time to fix it.
My questions are:
Can the guest complain as he just left when there were 5 days left?
Should I refund anything or let AirBnb resolve the issue?
Thanks in advance