Dear sir/madam，
We have a very unpleasent experience and we want to file a complain. We have book an apartment in Sydney，the booking number is HMMNTBQJ4Z .We checked out today and the host want to charge us extra AUD 30 per day，as she insist her cleaner said that we have five guests stayed in the apartment，it is ridiculous. We only have 4 people from the day we checked in and the day we check out，as we reported to her before we book the room. And we have cleaned all the trash before we left the house. We asked the host to check CCTV，which will prove that we only have four people walked in her apartment，but she is not willing to check CCTV and keep saying that she will issue invoice to charge us. We think the host do this intentionally，and want to treat us to pay more. It is racial discrimination and bully. It is unreasonable. Four of us applied visa together，theres no one else came to Sydney with us，we can prove that. Please kindly help to resolve as soon as possible. Thank you.