Most orders are usually delivered instantly. Some services tend to deliver up to 10 days due to organic promotion.
Find the timestamp that is located next to your username above your comment (for example: "3 days ago") and hover over it then right click and "Copy Link Address".
The link will be something like this: https://www.youtube.com/watch?v=12345&lc=a1b21etc instead of just https://www.youtube.com/watch?v=12345
To be sure that you got the correct link, paste it in your browser's address bar and you will see that the comment is now the first one below the video and it says "Highlighted comment".