Worst mobile device ever

Firstly i go in and tell the guy my phone is very slow, he says to me lets see what we can do, while he is busy with me him and the lady on duty with him don't give a damn that we are standing there they just talk to each other like in HELLO i am here, then he wants to reset my phone to factory settings i said no as i have done that before so he just goes and does it, like hello now i want all my info back on my phone ...We cant do it we don't have internet he says to me ..he is obnoxious and rude, i will never ever take a samsung phone in my life again this is the last time your phone is utter ****!!!!!!