Buying accounts from the forum members will not advisable for anyone. You have to understand that merit system here so your newbie account can goes to higher if you make the quality posts on the various threads.
As Bl4nkcode said you have already been tagged red by some DT members.
There is section(Accounts and Invites) here in the forum being used for buying btctalk accounts.
Sorry but I did not really understand everything thats why I created a mistake . Is there anyway to remove my negative trust?
Hmmm, I believed there are some ways to restore your Negative Trust back to Normal but, I've heard it was difficult that's why we really need to take good care of our accounts while it has no negative trust. It's your big mistake to attempt making a deal with the OP. I suggest you to start creating a new account and try to post constructive posts in order to rank up. I'm sure that you will still catch up to the rank of your tagged account if you create a new one and make sure that you will take care of your account this time, but if you can do good things here in the Forum like giving back a wrong send Bitcoin, your Negative trust will be removed and might even give you Green trust instead. But when will that happen?
It's your mistake to fall under a trap of a Newbie Member.
I hope you learned some lesson.