I send the below CSI today and waiting for reply, you can also try the same changing the format.
Dear Sir or Madam:
Please note that lot of MI1 applicant has got their medical request recently and I am still waiting for the same. As medical request are mostly sent through regular mail, but due to poor service in Bangladesh postal offices, sometimes the mails are not delivered on time and missed also. For this I want to know from your office if medical request letter was sent or not and if not can I have any approximation when it will be send so that I can be assured that I didnt missed the mail from the post offices.