Customer order not showing on store but is showing on 2checkout dashboard

[Thela]

Hi team, Please HELP me urgently
My potential first customer ordered from my online store but in my shopify dashboard there is no order showing so I sent an email to my payment processor 2Checkout and they confirmed the order was made twice! I now have to refund the cost of one product and order the product for the customer but idk if the payments from customer will reach my account. Is there something more I have to do? 2checkout is the only payment processor on my store

[BLTRWRLD]

I had the same issue and this was the solution:

Go to 2checkout Webhooks & API settings and make Instant Notification Service (INS) secret word and Buy link secret word THE SAME. I just generated a new INS secret word and pasted it into the Buy link field and it resolved the problem.

I hope it will help!