There are many ways to get a refund from EasyJet, such as by email or by completing the refund form. You have to visit their official website and fill in the refund request form, then you have to wait for the given time. Alternatively, you can submit an application by email, with some original documents.
In some cases, for some technical reason, your refund is not credited to your account. You can get in touch with an agent through a phone call or live chat.