You killed several mounds with a helicopter before being told not to do it again. You then went and broke two (or more) solar panels with your helicoper, and then just sat there and looked at what you did, before a staff member had to come on and refund them. You then decided to kill raiders with your helicopter blades just afterwards. In conclusion, you were very well aware you were exploiting, and after every time you were given a warning not to use that method of exploiting, you put effort to try and find another method to exploit.
Given the evidence people here have posted on the forums of you doing exactly what you said you were not doing, I believe that the removal should be revoked, and the ban should be extended based on the fact that you posted false evidence to try and reinforce your ban removal.