Can I ask if there is an user here who got their account back after plagiarizing. Thanks

Yes,
bill gator was initially banned but later the ban was reverted and he received a 2 year signature ban.
But in contrast to the OP, he actually increased the quality of this forum.
Yes I agree with you that bill gator has contributed into this forum but aside from him who is reputable in this forum already. For example, a normal user like me who isn't contributing to the forum

. I know that they will not get their account back so getting honest and putting some efforts to get your account back is considered useless if you plagiarized.