You need to remove his ally code. That goes against the ToS of the forums.
Send a PM to CG_LucifersDaddyMINI on here with screenshots of his ally code and any relevant info. It takes time, so don't keep sending him messages, it will bump you back in line.
Check swgoh.gg after the GAC and see if he really did. You might just not know counters.
Edit: I looked him up. He has no battles that are sketchy, I think this is just a case of you overestimating your defense.
Replies
Send a PM to CG_LucifersDaddyMINI on here with screenshots of his ally code and any relevant info. It takes time, so don't keep sending him messages, it will bump you back in line.
Check swgoh.gg after the GAC and see if he really did. You might just not know counters.
Edit: I looked him up. He has no battles that are sketchy, I think this is just a case of you overestimating your defense.
In regards to cheating, you need to send any screenshots or relevant information as proof to @CG_LucifersDaddyMINI.