DeepDyve is an online rental service which has a licence to host our content and is a separate company to Emerald. Emerald provides DeepDyve with the content but the rental arrangement is an arrangement between DeepDyve and the renter.
Therefore, you will need to contact DeepDyve directly as your free trial provision is with them. You can contact DeepDyve at http://www.deepdyve.com/contact and go to http://deepdyve.helpscoutdocs.com/ for further information.