Friend request

[HeavensAAA]

I want to be able to block users who spam with the friend request.

Unfortunately, you cannot block friend request. What I usually do (to persistent friend requests) is simply ignore it, of if he persists in repeatedly requesting/cancelling/requesting again, you can troll him back by adding him, check his fixtures for the season, and intentionally play a friendly against him 16 mins before every single competitive game of his.

I am sure he will be scared off forever.

PS. You can also intentionally stay as friend to support all his opponents every match too. Pretty sure no manager could stand that.