Hello FreMenss,
unfortunately, we cannot help with questions regarding bans here in the forum - you will have to submit an appeal for that. If you're having issues with the website, please try using a different browser or device and see if it works through that.
Regarding your thoughts about the ban being issued due to poor skill, that's not how the system works. If you've been banned for gameplay enhancement, then the system must've detected something that seemed to boost your performance or similar. As we don't have access to these infos here in the forum, I can't tell you what exactly it might be.