200 tdi defender boost issue

My intercooler boost hose keeps popping off, connects to the top of the intercooler fine but at the other end where it goes the hose clamps onto a metal connecting piece, this metal piece is loose and there seems no way of making it fit in tighter, clamping the hose onto it just makes the fitment worse, if you have a 200tdi defender engine you'll know what I mean if you've had it apart

Thanks and any suggestions welcome