You can easily determine the helpdesk that you need to contact, based on the groups in the SAP MijnApps portal:
(See below for a printscreen of the groups in sapmijnapps portaal.)

E.g. questions about the application Telework Request or Bicycle day register? -> please contact :
HR@UGent.be
 

Questions about tiles in the  SAP MijnApps Group:	Contact helpdesk:	Who is this:
Human Resources	HR@UGent.be	HR helpdesk
Finance	helpdesk.dfin@UGent.be	DFIN helpdesk
Environment, Health and Safety	m-chem@UGent.be	Environment, Health and Safety helpdesk
Financial Project Management	Focus@UGent.be	Focus helpdesk
Research	Gismo@UGent.be	Gismo Helpdesk
General	DICT HelpMe	DICT helpdesk
Facilitair beheer	DICT HelpMe	DICT helpdesk

To find the relevant group of the application: on the SAP MijnApps portal.