It has come to our attention that your discord account was inactived. If it was you that inactived it then you will need to make a new account. If discord staff (the big boys that actually run discord) banned you for breaking T&S (being under 13 while using their service) then you will need to go to this link and appeal to them. You're also welcome to just make a new account assuming they did not ip ban you for breaking the ToS as we're not sure how they handle these matters.
https://dis.gd/contact
https://dis.gd/contact