I am unable to process credit card transactions with reminder sales receipts. its is killing my business, and Quickbooks support is useless. anyone else seeing same?

Glad to have you in the Community, @tracpoint.

I understand that processing credit card transactions with reminder sales receipts in QuickBooks Online is crucial for you. 

I'm here to help you get the support you need from the appropriate resources. However, as it's not safe to provide sensitive information on a public platform like the Community, I suggest reaching out to our Merchants Services Support Team. They are experts in handling such requests and can request account information, check the payment's status, and investigate why it hasn't been deposited into your account yet.  

Additionally, I'm attaching an article that will assist you in managing customer payments for online invoices and in-person sales. Moreover, the article explains how QuickBooks Payments deposits work in QuickBooks Online.

• Take and process payments in QuickBooks Online with QuickBooks Payments. 
• Common questions about payments deposits in QuickBooks Online

Please feel welcome to send a reply if there are any additional questions or clarification you have in mind with, tracpoint. Have an awesome Friday!