Good app but

How do I stop paying for the monthly subscription, I do like the app, but I don’t want to pay for it because I will be deleting it because I never use it, I clicked the 7 day free trial but it’s been 7 days and I’m not sure if it’s going to just take my money forever now because i’m not going to use this app anymore

FlipFlopFizzy about Recolor - Coloring Book, v4.0.8