help me pls about my joyetech evic vt..im a newbie bought my evic 2days ago..and its came with nickle and titanium coil..first nickle works fine and i tried my titanium coil and its not firing inshort its not working even i alrdy set my mod into titanium..then i came back to my store and they cant fix it so thy recomend me to use it in power mode?its kinda wrong coz all review in youtube all titanium coil works in evic vt with titanium mode in it?so its ok to use it in power mode?coz i read its for kanthal coil.or i should force them to change my evic vt?and the store have 2weeks warranty..