I'll provide information about handling chargebacks in QuickBooks Payments and route you in the right direction for support to further assist you.
When processing chargebacks, you'll still be able to accept payments after the transaction gets disputed and the money goes back to the payer.Thus, you'll want to ensure that your QuickBooks Payments account remains active.
With this, I recommend reaching out to their Customer Care Team Support. They have tools to check your account and subscription safely and provide further information on what's causing this issue.
Here's how to contact them through QuickBooks Online (QBO):
From the Search tab, click Contact Us.
Enter your question and select Continue.
Review and choose from the following: Have us call you or Chat with us.
You can also check this link for more ways to contact them and see their available hours: Contact Payments Support.