"never get appointment, been referred back can't..."

I called on Friday after being referred back to doctors after ultra sound, no appointments call Monday 8 o'clock. Called 8 o'clock 103 calls got engaged tone then eventually put in a queuing system for nearly 5 mins to be told no appointments just drop in clinic for an hour in afternoon. Its a joke how are you ment to get an appointment. Always the same u have gone over for 8before 3rd in que and got last appointment. Feel sorry for receptionists as by time people get through are annoyed and then told no appointments. Bad management