Bought ad free version a month ago and no longer being honored – Solitaire: Treasure of Time Review

I downloaded this game on May 17 and purchased the ad free option that night. I love the game and it worked great until yesterday when the ads started showing up again. Customer service says I need to send them a screenshot of my purchase for proof. Considering I didn’t think I would need to prove this at the time, I don’t have one. Time to delete it.
Review by Too good to be true apparently on Solitaire: Treasure of Time.