Same issue here, charger plug die after 8 mont and just after a replacement of the surfacebook2.
I don't use a lot my surfacebook, got working station, nuc etc... So for a very few hours of use during less than one year got a full replacement and now a charger issue now...
Clearly surfacebook are just crappy hardware overpriced... Got less issue with cheap acer, huawei or computer under 500 euros...