You ordered something online. When the delivery came it was not complete. Write letter to company. In your letter: explain what you ordered and what was missing from your delivery. explain the importance of this delivery. ask for replacement item to be sent.

Dear Sir,
I am writing to complain about the recent order I had placed on your website. About 7 days ago I ordered a BP (Blood Pressure) monitor

online, which was delivered to me yesterday.

, on checking the contents of the package I realized that it the charger for the

is missing.
I had ordered

for my grandfather who is suffering from an illness which requires his blood pressure to be monitored at regular intervals. Incomplete shipment sent by you has caused a great amount of inconvenience to us. My grandfather is 80 years old and has restricted movements, we are facing trouble in taking him to the hospital every day for his blood pressure check. The primary reason to order

was to provide him comfort and save time.
I would like to know what actions you will be taking to get

rectified, I recommend you send me the replacement

with a charger as priority delivery as soon as possible. I have already sent the

I have received to your company address by FedEx – tracking number 123456.
I have been a user of your website since 2010 and

is the

time I have complained about any of your services.
I await your response.
Yours sincerely,
Dean Jones