A great way to build trust is by being personal. Giving people the feeling that there is are people behind your webshop gives them a feeling of control. They can contact you with questions, they know it is not a scam.
It starts with showing your contact details, but why not also show your team and a chat box? Coolblue is a company whose CEO has become the personal touch of the company. His face is not only shown in business publications but also on TV commercials, new product videos and on the thank you page after each other.