Hi @57
Thank you for reaching out about this and I am sorry to hear you had some difficulties deactivating your stores.
As long as you are able to sign in as the account owner you will be able to deactivate any store accounts you manage. You can sign into your store admin and navigate to Settings > Plan > Deactivate Store to finalize that.
If you no longer have access to your store owner account or need additional support with this, please reach out to our live support for additional help. To access our live support, please follow this link: Shopify Help Center. Next, you will want to follow the on screen prompts to sign in, choose your topic and issue and at the bottom of the help articles provided will be all available live support options.