It looks like I will be able to recover my account.
....
Is there any way to remove the trust "-1" from the account?
Glad to hear that. Did the buyer agree to return the account to you (the original owner) for free? Damn, people need to be more careful before buying an account here.
To remove the negative rating, you'll need to ask the feedback sender (KWH) to remove it. Send him a PM with a signed message to prove that you have regained access to the account.
Yes, he agreed. I tried to ask him for a BTC or ETH address to send him some donation, or the purchase price, but he refused it and said "will consider this as a loss". What a nice guy there.
Thanks, I will do that then.