Every mod that gives you an advantage, it's not lawful, regardless of where/when you use them. Coming back to ban's reason, you've been banned already once by Riot with the same reason you wrote above here:
44211 20/12/15 09:45 Moldova, Republic of 188.131.45.148 IP ban [RTF]Riot _KENT_ airbrake + weapons
As you already evaded 4 times, according to our rules 4 weeks gets added to your unban date (1 week per evade):
44435 16/02/16 21:29 Moldova, Republic of 188.131.78.210 _KENT_ [RTF]Meso ban evading
44436 16/02/16 21:32 Moldova, Republic of 188.131.35.24 1244 Queen ban evade
44437 16/02/16 21:38 Moldova, Republic of 46.166.32.137 _KENT_ [RTF]Meso evading
44470 25/02/16 21:58 Moldova, Republic of 188.131.64.144 vespa [RTF]Meso _KENT_ ban evading
This means that you'll be unbanned on 17/01/2018