Who's to blame?

For some time my wife Enid was being treated for ulcer like wounds on her hip she developed a stomach wound which at first small but got worse to point it was black and smelling and Enid was starting to get unwell.So we called out district nurses to check over and senior matron decide Enid needed to go into hospital at no point did a doctor come out to check her over.Whilst in hospital Enid had five operations in her stomach was put on a vacuum pump to help heal wound this was the second time happen as frist was for her hip ulcers.Enid was back for a week when wound look ed sore yet again no doctor who told over the phone needed to go back to hospital which she f2f but consultant was unhappy as told her that the district nurses could have dealt with it .Who do I blame all of them for failing to their duty and myself for not pushing it.