Samsung Electronics Samsung Repair Center, McAllen, Tx Faulty cellphone diagnosis; tried to extort $506 McAllen Texas

Re: Note 4 rebooting, restarting, freezing, not restarting properly, Wake Lock

My Note 4 failed upon System Software update.  Never came out of the update, could not get past the red Verizon splash screen.  Sent it to Samsung repair in McAllen, TX.  The charging port had died exactly one month after the warranty was up, so the only way to charge the phone is to use a Chinese inductive charging disk.  Samsung McAllen came back with three successive price increases for the repair.  First to install a new charging port, then an LCD screen and then a motherboard (PBA) totaling $506.  Now, I have to ask those technicians in the McAllen repair center:  How do you determine if the LCD failed diagnostics if the charging port does not work?  How do you determine the motherboard failed diagnostics if the charging port is bad in the phone?  Something is horribly wrong somewhere!!!  Now they are sending the phone back to me as totally inoperative because I refused to pay $506.  It is time to go to another smart phone manufacturer, I am sure!!!  John in Burlington, NC.