You have several elected representatives at different levels of government.
Buckinghamshire County Council and its district councils merged into one Buckinghamshire Council in April 2020. Elections were due to be held in May 2020, but these were postponed for a year because of COVID-19. The official site has a PDF that assigns existing councillors to any ward their previous area covered; for simplicity we keep showing the two levels of councillor here, though all are now equivalent councillors on the same unitary authority.
Your 2 Amersham Town district councillors represent you on Chiltern District Council. The District Council is responsible for local services, including planning, council housing, and rubbish collection. Most district councillors are not paid a salary, but get a basic allowance for the work they do.
Your Penn Wood and Old Amersham county councillor represents you on Buckinghamshire County Council. The County Council is responsible for local services, including education, social services, transport, roads (except trunk roads and motorways), public rights of way, and libraries. Most county councillors are not paid a salary, but get a basic allowance for the work they do.
Your Chesham and Amersham MP represents you in the House of Commons. The House of Commons is responsible for making laws in the UK and for overall scrutiny of all aspects of government.
As the UK left the European Union on 31st January 2020, you are no longer represented by MEPs.