The East of England Ambulance Trust, which has consistently failed to meet response times, has been slammed for failing to listen to staff.
A plan to transform patient care and boost staff morale has been launched by the East of England Ambulance Service NHS Trust.
MPs have met with bosses from the East of England Ambulance Service to raise their concerns about issues including poor response times.
A hard-hitting report on the problems of the East of England Ambulance Trust is calling for more paramedics and more ambulances on the road.
The latest inquiry and report was conducted by Dr Anthony Marsh on behalf of the NHS Trust Development Authority.
Dr Marsh, who is chief executive of West Midlands Ambulance Service NHS Foundation Trust, wrote:
"There is a feeling across the organisation that the trust board does not listen...the board have only recently accepted that there is a shortage of front line ambulance crews within the trust yet managers state they have been raising this for some time."
The Witham MP Priti Patel has responded to the publication of the Governance Review into the East of England Ambulance Service Trust by calling for the Trust's non-executive directors resign and a new Board to be established.
Ms Patel said: "This damning report has demonstrated that the Trust's Board has been failing for many years and their lack of leadership and competence has put patients' lives at risk."
"The non-executive directors who have let patients down should do the decent thing and step down."
A report into problems at the East of England Ambulance Trust has made 25 recommendations to improve the service.
The trust has been told to review overheads, improve communication and put in place a robust recruitment plan.
The report by Dr Anthony Marsh, the Chief Executive of West Midlands Ambulance Service, says the East of England Trust Board and Senior Management Team "appear to have developed a sense of helplessness."
The Ambulance Trust has been heavily criticised in recent months for poor response time in rural areas.
The Care and Quality Commission (CQC) has just published its Inspection report into the standards of care at the East of England Ambulance Service NHS
The CQC found action was needed in the Care and welfare of people who use services. It met all other standards.
The chair of the East of England Ambulance Service is being urged by MPs to consider her position at the trust.
Maria Ball is facing criticism as MPs met with her and other senior staff from the ambulance service. It follows concerns about recent performance and response times.