There are a number of sources of help when you have issues with public sector tendering.
UK (non-devolved central government)
If you experience problems with public procurement processes with UK central government departments and the non-devolved public sector, you should provide feedback to the Public Procurement Review Service at the Cabinet Office. You can contact them by sending an email to email@example.com or by contacting their Service Desk on Tel 0345 010 3503.
Before submitting feedback to the Cabinet Office, you must read the terms set out in their scope and remit. This explains what they may be able to achieve in relation to your concerns. By submitting feedback to the Mystery Shopper Scheme you are accepting the scope and remit of the service.
The Cabinet Office publish the results of the investigations into the cases received.
Republic of Ireland
If you experience problems with public procurement processes in Ireland, contact the organisation responsible for the procurement and present your concerns. The 2010 Remedies Regulations provide a clear framework for the judicial review of public contracts in Ireland.
An informal alternative is the Public Procurement Network (PPN). This is a free service which is designed to resolve misunderstandings and discrimination claims quickly before a procurement contract is signed.
If approaching the PPN does not solve the problem, you can choose to take more formal action or use the SOLVIT system, an online problem-solving network, which is monitored by the European Commission.