Let us shed some light on this for you, Nuzair.
The new QuickBooks Online (QBO) interface you're describing is part of a gradual rollout by Intuit. By canceling and resubscribing, your account likely moved back to the group without the update.
Also, there is no option to get the new interface instantly since this rollout is a progressive process. It's possible that the update has not yet reached your QBO account. All QuickBooks customers will be automatically switched to the new Intuit Platform experience by the end of September 2025. To learn more about this one, check out this article: Explore QuickBooks on the Intuit Platform.
Revisit this thread if you have further questions about managing your business or QuickBooks-related concerns.