Why have I been paying 7.50 and this last month was $15

Hello there, dina2020.

Here in the Community, we're unable to check and validate what's the $7.50 and $15 charge of yours. That being said, I recommend reaching out to our Phone Support team. They have extra tools that can open your account. 

Here's how you can contact them:

1. From the ? Help button, click Contact Us.
2. Enter, Can you validate the $7.50 and $15 charges on my account?
3. Click Let's talk.
4. From there, select how you'll want to contact them.

I've also added this article that has the lists of what Intuit charges on your bank statement: Understand Intuit Charges On Your Bank Statement.

Let me know if there's anything that I can help. Take care!

@dina2020  

Your discounted period may be over and now you have to pay the regular rate. You can open a new QBO account with the same email address with current discounted rate and migrate data from your old account.

https://quickbooks.grsm.io/EU

https://quickbooks.grsm.io/South-America