Here's a draft letter to send to your overseas chamber along with the necessary details. Be sure to include any specific information and documentation that will help the legal expert understand your situation fully.
Dear Overseas Chamber/Lawyer's Name,

I hope this message finds you well. I am writing to seek your expertise and assistance regarding a legal matter involving my family in Bangladesh. Last year, we were served with legal notices concerning a property dispute, which subsequently led to a settlement facilitated by our barristers. Unfortunately, I believe that justice was not fully served in this case, and I am seeking a thorough review and potential legal action to rectify the situation.

Background:

    Legal Notices Served:
        Date: Date when legal notices were served
        Nature of Notices: Brief description of the legal notices and the claims made

    Settlement Details:
        Date of Settlement: Date of settlement
        Parties Involved: Names of parties involved in the settlement
        Settlement Terms: Brief overview of the settlement terms

    Concerns and Beliefs:
        I believe the settlement was not just and did not address the underlying issues fairly.
        There are specific aspects of the property dispute and associated criminal allegations that were not properly considered or addressed during the settlement process.

Key Issues:

    Property Dispute:
        Description of Property: Detailed description of the property in question
        Historical Ownership and Disputes: Brief history of the property ownership and any previous disputes

    Criminal Allegations:
        Nature of Allegations: Description of any criminal allegations associated with the property dispute
        Impact on Family: Brief overview of how these allegations have impacted my family

Request for Assistance:

    Review and Analysis:
        Thorough review of all legal notices, settlement documents, and associated correspondence.
        Detailed analysis of the property dispute and criminal allegations from a Bangladesh legal perspective.

    Legal Advice and Potential Actions:
        Advice on potential legal actions to challenge or revisit the settlement.
        Guidance on any criminal law aspects that need to be addressed to ensure justice is served.

    Representation:
        Potential representation or referral to a qualified legal expert in Bangladesh specializing in property and criminal law.

I have attached copies of all relevant documents, including the legal notices, settlement agreement, and any other pertinent information, for your review.

Could we schedule a consultation at your earliest convenience to discuss this matter in detail? Your expertise and guidance would be invaluable in helping my family achieve a fair and just resolution.

Thank you for your attention to this matter. I look forward to your response.

Best regards,

Your Name
Your Contact Information
Your Address
Your Family's Contact Information, if necessary

Next Steps:

    Gather Documents:
        Ensure you have all relevant legal documents ready, including legal notices, settlement agreements, and correspondence.

    Consultation:
        Schedule a meeting with a legal expert specializing in Bangladesh property and criminal law to review the letter and provide feedback.

    Legal Strategy:
        Discuss potential legal strategies with the expert, including challenging the settlement and addressing any criminal law aspects.

    Follow-up:
        Based on the legal expert's advice, take appropriate actions, which may include legal filings or negotiations to address the issues raised.

By providing detailed background information and a clear request for assistance, you can help the legal expert understand your case and offer the best possible guidance.