Depending on your detachment, you may be able to reach them through social media (Facebook etc), or you can visit in person on a parade night to speak with the staff.
If you are having difficulty reaching your detachment staff, you can also contact the County team. Each County's contact details can be found on the Army Cadets website.
Please note - it's not possible to contact your detachment directly through your MyCadet account or by raising a Helpdesk ticket.