[2020] I need help with the costumer service issue of Arenanet

Edit: my conversation with Arenanet: http://imgur.com/6aeLOMN (read from down to up)

So I have spend over 300 euros on my account and never cheated whatsoever. I am a trustworthy payed costumer and for some reason they just blocked my account Arenat claimed that I was tampering with the game which is not true.

They didnt want to give me further details/proof and I am not allowed to use my account ever again.

They asked me personal questions and I answered them all correctly and yet I keep pleading them to provide me with proof, but they just send me the same mails over and over again.

I believe that I am hacked, I just cant find a different reason for this. I am capable of hiring an attorney because this is for my belief against the law to treat me this way.

I just want to know how I can deal with this, because I want to deal with this juridical or speak to someone in higher rank in Arenanet.

And I have the mails for anyone who's interested.

TL:DR My account is permanently blocked, but I am a trustworthy paying costumer. They didnt provide me with any proof and I want to go juridical to get my account back.