Hello Tunbosun,
Thank you for your reply. Yes, that is the plugin in question.
My issue is that the woocommerce mails sent to the customer has the customized order now (from the sequential order number plugin), while the receipt sent to the customer has the original woocommerce order number (which is the setting I selected from the paystack payment gateway).
The ideal thing is for the two communications to reference the same order number. Hence my request.
Should be grateful for any assistance.
Regards
Tolu Oyebade