"Uncontactable Orthopaedics department"

I have been calling the Orthopaedics department for days as I have a post-operative infection in my partial knee surgery and cannot get hold of anyone in the department. The extension number I was given does not work, the "mailbox is apparently full" so I cannot leave a message and I am really struggling to find out what I can do or speak to my surgeon / his secretary. My local GP's are not invested in my case and are just prescribing broad spectrum antibiotics which are not working. Please supply me with the correct contact details for this department - this is very worrying and I am extremely stressed.