Impossible to reach

My wife has moved overseas, and cancelled her account before she left. The account has apparently not been cancelled and try as I may, I cannot get in touch with anyone to assist. No electronic communication portals, all the numbers I call just go dead. It's literally impossible to make contact. I need to close this account, as we are immigrating to the uk. I've tried calling, going to non existent offices and no matter what, I just cannot reach anyone.