I wanted to cancel my subscription. After clicking the "Cancel my subscription" Button, the screen is blank and doesn't go anywhere... Any suggestions?

Let us try to check if this is a browser-related issue, @looslimichael.
 
There are times that the stored data in your browser caused this odd behavior. I’d be glad to guide you through the steps on how to do troubleshooting steps.
 
Here’s how:
 
First, we have to try a private browser to cut the amount of data collected by websites. Check the shortcuts below:

• (Google Chrome) Press Ctrl + Shift + N keys on your keyboard.
• (Firefox or Internet Explorer) Press Ctrl + Shift + P keys on your keyboard.
• (Safari) Press Control + Option + P keys on your keyboard.
   

Then, if you can see cancel the subscription, you can go back to your regular browser and clear the cache to verify if you have completely canceled your subscription. But, if that behavior still exists, I recommend using another browser to get this fixed.
 
Lastly, if you still found the same issue in other browsers, I suggest contacting our Customer Support Team to verify your account and cancel the subscription for you.
 
The data is still available within 8 to 12 months after you have canceled your QBO subscription. It’s better if you have the hard copy ready on hand, to avoid hassle on your part.
 
For more details about the cancellation of your QBO account, check out this recommended article: Cancel your QuickBooks Online subscription or trial.
 
Also, for future reference, here is an article that might be handy if you want to reactivate your QBO account: How to resubscribe or reactivate QuickBooks Online.
 
I’m just one comment below if you need further help. Take care.

Hello there...

I tried the suggestions, but all end in the same result. Please cancel the subscription on your side. Alternatively we can let it be; my credit card is expired and won't produce any subscription fee. Please let me know what to do. Thank you!

It looks like this is a duplicate post, looslimichael. 

Let me route you to the thread where my colleague answered your question with the detailed steps on how to contact us. Please click this link and you'll be routed to the thread. 

If you need more help, I'll be here to assist you. Thanks!

Hi Stephanie,

Thank you for your detailed answer. Unfortunately the issue persists on any device and any browser I tried. I'm asking for an expedited way to cancel my subscription and be refunded for the charge for 2020. The account can be deleted immediately, since I don't have any data stored. Thank you for your appreciated help!

Hi there, @looslimichael. I'm here to provide you details on how to get the assistance that you're looking for with canceling the account.

You'll need to reach out to our Online Support because they have tools that can help cancel your account and process a refund for the charge for 2020. They can easily look into your account and give you the assistance that's needed. Below I've provided steps on how to get in touch.

How To Get Contacted by QuickBooks Online:

1. Log into your account.
2. At the top-right of Dashboard, click on the (?) Help icon.
3. Press on Contact Us.
4. Type in your question, concern, or the department you're wanting to speak with in the Description box.
5. Hit Let's Talk.
6. Choose how you want to get contacted.

This is how we can get in touch with you. Once you do these steps, you should get contacted in no time! 

Let me know if you have any more questions or concerns. Have a nice day.