I don't think playing against bots at the beggining and getting a very high K/D is bannable. Considering they lock that away from you after certain rank , this isn't any " competitive advantage " as long as it's only for a couple of ranks when the account is new, just wasn't making sense otherwise.
If that so, for sure it's a problem they will fix... sadly because the game is very early yet they have to take care of a lot of things now ( so far from the posts made here). Be patient waiting for the response, nothing more you can do at this point.