The best method is to use email. My address is firstname.lastname@example.org
Very occassionally due to some techincal reason you may not receive a reply. If this happens, first please check your spam folder in case my reply has been filtered. If my reply isn't in your spam folder, then please try to contact me again using my backup email address email@example.com.
For particularly urgent issues you can contact me by phone or whatsapp. My number is: +7 981 106 40 12
I don't answer calls when I am guiding tours so generally instead of a voice call it is better to send an SMS text message or chat message on whatsapp. This way I can check messages and reply when I'm free.
You can also find me on facebook.