You didn't download or otherwise obtain the repository from us (the official Kodi site), you downloaded it from a 3rd party (para)site offering unofficial add-ons, or perhaps what you bought was a "fully loaded" device which come pre-installed with all sorts of 3rd party junk. Kodi is just a media player - the official build does not come with any media sources pre-installed at all. We also do not provide or sell hardware or players (aside from a Pi case).
If they are available within Kodi without installing anything previously (such as the "fully loaded" example), then you do not have the proper official Kodi build, but some 3rd party modified build, most of which are solely designed to facilitate piracy (and for which we also offer no support and which we dislike intensely).
I would suggest you have a read of
this blog as it may offer some further enlightenment about the situation you've found yourself in.
