Transfer:Request of strengthening position

Hi everyone.
I have a huge problem with new players that requested squad strengthening.
Even if i buy new player that is strenghthening for team, on exact position, even if he score in first match, the one who asked for strengthening is dissatisifed.
If i ask him for help, he do not want suggest any player.
Please let me know what i can do with this.

the coaches are responsible for that and you can set the focus