"Nil Support"

Having been admitted following a car accident it was discovered that I had an electrical block" in my heart. I was sent home with an appointment to re-visit the hospital to collect a 24Hr heart monitoring unit. This I did and returned it in January. It is now April and I have heard nothing. Unable to contact the dept for info. Ridiculously long wait for reception and continuingly being put through to the incorrect extension. The incorrect extension says if it is incorrect press 0 to get back to the reception. Then off we go again for the long wait. Still no results. Hopefully this condition is not serious?