Well, I can also sympathize with you... in that position it's really hard.
Even if you were living in your own, and were financially independent, you
should always thrive to make your family relations work and be in a nice
place. Simply being stubborn and acting carelessly is the way of a child.
So... I guess I would maybe advise you to:
a) always show to them you are thankful they thought of you and cared enough
to get you a phone;
b) keep on explaining the reasons you don't want a phone, maybe trying to
adapt it to their language and way of life, one day they might understand;
c) cooperate, like sometimes take the thing with you even though mostly you
leave it at home, also check it everyday at least once a day to make sure you
reply back to any message or lost call;
Apart from this I only wish you the best.
