An HTC user for a decade. Had worst experience in ...

An HTC user for a decade. Had worst experience in support, when i finally needed it.
My HTC Desire 820 stuck in boot loop and when i called support, only answer i got is that "our mobiles are designed per country so don't use HTC phones in other countries. Your mobiles will be serviced only in country where it is designed for. " so i cant use an HTC mobile in USA which i bought in India.