It's always good to know where your money's going, so here are some quick ways to check the status of your Plus subscription:
Your profile
Go to your profile by tapping the person icon in the top right corner of Chat. If you have Plus, you'll see a star and the word Plus to the right of your name. If you're back to using the standard version of the app, it will show a heart and Free.
Borrow
If you've successfully canceled your Plus subscription, you'll see an ad for Plus.
If you you have an advance out, you'll be able to see the status of that advance, or you will be able to request one.
If you've canceled your subscription, you will also have received an email, so double-check your inbox