A group which SpaceX is a member of raised concerns that launches by ISRO are allegedly subsidised by the Indian government and therefore the pricing is anticompetitive but have also acknowledged that the market served by the PSLV is badly serviced by American companies. They're not the only ones to raise the same concern but no-one's seriously crying about being undercut.
Even as it is, the Falcon 9 and PSLV price per kg to LEO are pretty much the same with newer Falcon 9 winning out slightly.
