having trouble with ILI9481 3.5'' TFT touch screen

Guys, I'm new to the forum.

I recently bought a 3.5'' LCD TFT shield to use with and arduino Mega 2560 board. I tried it with a basic test wich makes the screen change colours and the shield works fine, but that code uses no library. All test codes that came with the shield use an "Adafruit TFT LCD " library as well as an "Adafruit GFX" library. I guess I'm not using the right libraries or their latest version. I saw that a lot of people are having the same issue and want to know if there's a debugged or tweeked library available somewhere in which I can use these same test codes or other libraries that come with different test codes for screen displays and touch test.

I heard some are using the TFT HX8357 library instead but I cant find examples or test codes there. I dont want to throw the shield against the wall. Is there a genious out there that culd help me ?