Okay, so I basically mined my Tardis. Now I cannot summon it back and I cannot transfer its ownership. Is there a way to remove the old tardis from my owner list?

In other words i need an admin to help me delete my current tardis help

TARDISes cannot be deleted unfortunately, Once its placed, it can't be removed from your owner list. Staff can summon it back for you and then you can transfer the ownership to someone else that doesn't own a TARDIS.

 Technically if he has a tardis key, he can summon his tardis back himself, I think

 I believe that's the way to do it only if its linked 

the tardis was destroyed and it still says I own it.  I can't bring it back since my key isn't working

 Did you enter another tardis afterwards and did you link your key to your tardis by shift-right clicking