Okay it looks like the “Thank you” page routine is not completing successfully.
Have you done the following and it is working as you expect?
http://www.tipsandtricks-hq.com/ecommerce/wp-estore-instant-digital-product-delivery-499
Alternatively, in your eStore’s settings, use the following URL as your thank you page and that should do the job:
[http://delicat-studio.co.uk/thank-you/?reset_eStore_cart=1]