Cant pay manually sent invoices

[KevinMalmberg]

I use manual invoices to collect payments.

On checkout, customers can only enter their address + contact information and not pay directly.

After that, I manually look through the order and send an invoice manually through Shopify.

But the manually sent invoices only sends the customer back to the original checkout, where I turned off the option for payment.

How do I make so the manually sent invoices are payable?

To clarify, I send invoices through Shopify own invoice system in "orders"

[KevinMalmberg]

In the invoice there is this button:

I click it and it sends me to this page

Which is the exact same page as the first checkout on the website itself.

I have earlier turned off payment methods at checkout since I want to manually send invoices. But that should not affect my manually sent invoices payment methods, or am I wrong?

[KevinMalmberg]

I'm on the basic plan on Shopify at the moment, so I can only have one account with access.

Could you write stepwise how I do to solve the problem?

Possibility of a screen recording? 

Would mean a lot to solve this issue.

[KevinMalmberg]

What do you need access to, and what is your mail address?

I'm adding as staff

[KevinMalmberg]

Or can you ask for access?