change email receipt of an order

I want to Change the email receipt of an order.
I want Change a the top the Headline and on the top I Need also the phonenumber and Country.
Enclosed you can see a Picture of my changes (bold black text).
kindly regards

Hey there,
I hope you’re doing well today

It seems as if these receipts are generated by WooCommerce.
The theme wouldn’t control this, as there aren’t any WooCommerce template files.
Kindly contact WooCommerce Support to see if there’s a solution for this.

Best Regards,