The trustees are required under the provisions of section59(1)(a) of the Pensions Act 1990 (as amended) to ensure, insofar as is reasonable , that the contributions payable by you and your employer, where appropriate, are received by the Plan.
If you are concerned that any contributions have not been paid in accordance with the Plan rules then you should contact:-
Firstly, MyPension365 Team
and then, if necessary, the trustees of the Plan and the employer
and then, if necessary, the Pensions Authority, Verschoyle House, 28-30 Lower Mount Street, Dublin 2