If your Gmail Account is flooded with too many spam emails, then you would definitely try to find out the ways to block that sender. You can simply proceed with this process just by reading the online blogs and articles. There are number of videos that are eventually tech guides. It broadly explains the ways to block someone on Gmail. Now, supposedly you read the blog or watched the videos and tried to execute the steps properly yet you are unable to fix it then you must seek help from the Gmail Customer Service.