Hello @webdesigndiva
when orders has been made in sandbox mode there is no way to migrated them to live mode and collect the awaiting payments.
Normally your customer shouldn’t be have charged for these orders.
I would recommend to contact your customers to re-create these order while your website is in live-mode.
Have a nice day
Kind regards
Andreas
Thank you so much for your prompt reply Andreas. Thank you for clarifying this for me.