QB Issue Resolution:

log into the one you do not want, then gear>account>billing>cancel

and/or log in and change the credit card info, the ccv code or expiration date

you can also go to this page, https://help.quickbooks.intuit.com/contact?

click Your QuickBooks Account

click view support options

click contact us

800.488.7330

6AM-6PM (PST) Mon-Fri,

6AM-3PM (PST) Sat

check to insure the number has not changed, again.

Resolution for Issue 'How can I delete the company set up in error and ensure the billing is refunded and stopped for future transactions?' available: Yes (Solved).
Source: Intuit Community forum.

How can I delete the company set up in error and ensure the billing is refunded and stopped for future transactions?: this issue or error code is a known issue in Quickbooks Online (QBO) and/or Quickbooks. Support for this issue is available either by self-service or paid support options. Experts are available to resolve your Quickbooks issue to ensure minimal downtime and continue running your business. First try to resolve the issue yourself by looking for a resolution described below. If it is a complex issue or you are unable to solve the issue, you may contact us by clicking here or by using other support options.

Support for billing
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Error Recovery for billing [Canada]
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Additional Support Options: