Contact by e-mail is a suitable method, especially since misunderstandings are avoided in writing. Sometimes it may happen that you do not receive a response in the time you would expect. This may be due to the complexity of the query, a holiday, or an unexpected amount of queries. Usually answered within 24 hours (on working days). If you do not receive a reply within 48 hours, please also check the "spam" folder by searching with the word "traiva".