Why space usage is not updated after I erased all submissions?

Dear Sir or Madam,

Yesterday I have erased all submissions to free usage space. On the next day, It still shows that space is taken to the limit. I am attaching screenshot with this request.

What else should I do to free up the space?

Look forward to your reply!

Hi, thank you for contacting support.

I have now recalculated your upload space counter, and your forms should be working fine now.

Please check and let us know if you have further questions.

Yes, it works now! Thank you very much!