@Marianna85 to reach Airbnb support:
On your Help page, near the bottom right is a "Contact us" button.
Or you can use this link: https://www.airbnb.com/help/contact_us
Once you are on the "Contact us" page, choose "Its something else"
This will give you the choice to either exchange messages with AirBnB or to speak to someone on the phone.
(Using the "Contact us" by phone gives you the option to have them call you, so you don't have to wait on hold.)
If you don't mind waiting on the phone, here are many contact numbers:
United States +1-415-800-5959 +1-855-424-7262 (toll-free)
Argentina: +54 11 53 52 78 88
Australia: +61 2 8520 3333
Austria / Österreich: +43 72 08 83 800
Brazil / Brasil: +55 21 3958-5800
Canada: +1-855-424-7262 (toll-free)
Chile: +56 229380777
China / Zhongguo - 中國 / 中国: +86-40-0120-9157 or 400-716-0164 (shared-cost)
Denmark / Danmark: +45 89 88 20 00
France: +33 1 84 88 40 00
Germany / Deutschland: +49 30 30 80 83 80
Greece / ελλάδα: +30 211 1989888
Hong Kong / Xianggang - 香港: +852 5808 8888
India / इंडिया: 000 800 4405 103 (toll-free)
Ireland: +353 1 697 1831
Israel / Yisrael: +972 3 939 9977
Italy / Italia: +39 06 99366533
Japan / Nippon - 日本: +81 3 4580 0999 or +81 800 100 1008 (toll-free)
Kenya: +1-855-424-7262 (toll-free)
Malaysia: +603 7724 0164 or 1800 889 814 (toll-free)
Mexico / Méjico: +52 55 41 70 43 33
Netherlands / Nederland: +31 20 52 22 333
New Zealand / Aotearoa: +64 4 4880 888
Norway / Norge: +47 21 61 16 88
Peru: +51 1 7089777
Poland / Polska: +48 22 30 72 000
Portugal: +351 30 880 3888
Puerto Rico: +1 787 945-0222
Russia / Rossiya - Россия: +7 4954658090 or 88003017104 (toll-free)
Singapore / 新加坡: +65 6622 7306 or 1800 723 1238 (toll-free)
South Africa: +1-855-424-7262 (toll-free)
South Korea / Hanguk - 한국: +82 2 6022 2499 or +82 808 220 230 (toll-free)
Spain / España: +34 91 123 45 67
Sweden / Sverige: +46 844 68 12 34
Switzerland / Schweiz / Suisse: +41 43 50 84 900
Taiwan +886 2 7743 2436 or 0800 868 313 (toll-free)
United Kingdom: +44 203 318 1111