Good day, @Sunflower.
I'd be glad to help direct you to the right support to assist you in deleting duplicate entries in your merchant account.
If you’ve processed and posted a customer payment to your Merchant Services account, it should automatically flow to the assigned account in QuickBooks Desktop. There’s no need to re-record nor delete the transaction to avoid getting duplicate entries and messing up any information added in your data.
To review the payments posted in your account, I'd recommend getting in touch with our Merchant Services Team. They have necessary tools to securely access your account and ensure to delete duplicate payments so that your entries are recorded correctly.
I'm sure this will be taken care of. If you have other questions about your payments, please don't hesitate to reach out again. I'll be here to help. Have a good one.