I have purchased an Arduino Mega 2560 R3 and want to connect a 3.5" TFT LCD to it. I am aware that I have to enter the source code but am stuck. There was no code sent with the screen.

I bought it from:  Arduino Mega 2560 R3 R61581 3 5 inch TFT LCD Touhscreen Shield | eBay.

I was directed to this site:   UTouch - Electronics - Henning Karlsen

for the UTFT and UTOUCH codes. I have added them to my library but the UTFT names do not match my screen when I try to run a configuration

What am I doing wrong. I am new to this so you will have to explain it bit by bit please.