1 - You should read your own writing before handing it over to a teacher or proofreader. For example, look at L2 "the Owners’ Association of the estate of ABC estate".
2 - Make your writing realistic: "Sam lost 4 million dollars and much jewelry".
3 - Do not stray off course. Here, you were asked to "explain some of the measures your association has (already) taken to protect people from being tricked in future", but you actually gave suggestions even involving the government!
The last point is extremely important, and I've seen many students lose valuable marks because they answered the wrong question.
Try writing your letter again and we'll look at it for you.
Student or Learner