Request Of Full Refund - Sticker.ly

I am writing about an issue I experienced with a subscription purchase in the sticker.ly app through the Apple App Store in the United States. On July 1, I tried to start what was presented as a free trial, shown at a low price, but at checkout I was charged $39.99 instead. The relevant Apple transaction number for this charge is MKX7SSLKG1. As soon as I saw the charge, I cancelled the subscription immediately, within minutes, and I did not use any of the subscription features at all. Despite this, the $39.99 payment was still processed and I was not given the option of a proper free trial as advertised. I request a full refund of the $39.99 that was charged, since the offer was misleading and I cancelled right away without using the service. I would also appreciate it if you could review how this free trial and its pricing are displayed so that other users are not confused in the same way.