I’m being charged

How exactly do you know that those $50 are for the Nebula subscription?

Subscriptions started through your Apple account, will not state what they are for on your payment method's statement, only appear "apple.com/bill".

If it says specifically that it is for Nebula or Scrub, then it suggests you started the subscription directly with them on their website, and as such you need to cancel it there as well.

With that said, only you can cancel your subscription, nobody else can do it for you.

Follow the steps in the support document linked below.

click here ➜ If you want to cancel a subscription from Apple - Apple Support

Sounds like you clicked a link from a Social Media site or website advertisement and started a free trial directly with the company. This bypasses Apple's ability to cancel the subscription and you are stuck with dealing with that company to cancel and/or request a refund.

Here is the information Nebula provides about their subscription terms:

https://appnebula.co/tech/subscription-terms

You can check for the subscription here:

https://appnebula.co/cancel-subscription

Their refund policy is available here:

https://appnebula.co/tech/money-back-policy

In the future stick with in-app purchases for any subscription/free trial, so they can be easily cancelled by Apple. When signing up directly with a company, your subscription is being managed by that company and they are billing your card directly.

Hi, did the app offer a free trial for a limited time such as 7 days? Which Nebula app are you referring to? There are several Nebula apps ranging from Astrology apps to streaming channels?