Dislodged heater control fascia trim.

Whilst trying to ensure that the fan heater control knob was firmly sitting in place, it has appeared to be slightly loose in the past, I pushed on the knob only for the fascia trim with the two control knobs to become dislodged back into the hole in whci it sits. Everything still works but i have not been able to resite it. I thought that I might be able to reach throughou the drop down drawer but no joy. I did not hear anything that sounded like plastic breaking but I am worried about just trying to pull it back without knowing what I am doing. Has anyone any ideas or been daft enough to do the same as me?