I can help you with reaching out to our customer support, @amondejar.
Can you share with me details of the issue you're having? I may be able to assist you or provide insights into what may be happening and come up with a solution.
If you still want to talk to one of our support, you can reach them by arranging a callback or through chat. You can do it by going to the Help icon at the top right of the account. Follow the steps below:
Go to the Help icon to connect to a live support agent.
Click on the Contact Us button and provide some details about this concern.
Provide us with some information about your concern in the What can we help you with? box and click on Continue.
You'll now be provided options on how to connect to our Customer Support.
Check this article for more information about the different types of support we offer and their availability: QuickBooks Online Support.
I'll help you uninstalling the app from your computer or mobile phone.
Before we start, can you share with me the error you're getting when opening or using the QuickBooks app? Any additional information would be much appreciated.
I'd also want to inform you that QuickBooks Online Windows and Mac desktop apps are no longer supported as of April 20, 2021. Therefore, downloading the program, receiving customer support or software updates and bug fixes will be unavailable.
This won't affect your QBO account and you can still sign in through the app or browser.
If you're using a QBO mobile app and wish to uninstall the program, you can perform a Forced Stop/Quit on iOS or Android. Simply long-press the Home button and swipe an app's preview card upward on iOS or to the right on Android to force quit.
Once done, you can now download the app again on Google Play Store or App Store.
I've also added some resources that you can use to help manage your QBO app: