You want to get what you want. If you don’t already have it then what you’re doing is not going to get it for you. You know that the definition of insanity is doing the same things and expecting different results. Here are some clues on what you might consider doing differently.
The Primary Tactics Used to Influence Others outlines very methodically different ways to persuade and influence.
Which is your favourite?
And while you’re at it, check out this modern version of how the Trojan Horse works in influencing.