জার্মানি ভিসা রিজেক্ট কেন হয়েছেন?

Application Format:

To
The Head of Visa Selection
Embassy of the Federal Republic of Germany
Madani Avenue, Dhaka, Bangladesh.
Subject: Appeal against refusal of my application dated ..
( Visa interview Date).. regarding visa.

Dear Concern,
I have the honor to state that, myself ..(Name of yours).. 
and I faced my visa interview on ..(Date).. for the winter semester 2019 
and also paid my documents verification fees on that day.
My visa application file number is ..... 
Unfortunately, I was nervous and stressed about the visa interview because
if I do any mistake then I can’t achieve my dream to study in Germany.
 As a result, I failed to elucidate my best in front of the visa interviewer. 
But at that time, I tried to give my best as much as possible. 
It is my dream to achieve a Bachelor of engineering degree from Germany which 
is known as the haven of Engineering. 
I worked hard for a long time to make my dream come true. 
I was successfully passed all the steps except getting a visa. 
If I get it than I can work to make my dream come true this year,
otherwise I have to wait 1 year for next semester.

I have fulfilled all the requirements for studying at the
German University. My course language requirement is .... 
and I achieved the score.
I wish to elucidate my best in front of the visa interviewer 
if you kindly grant me another opportunity.
Warm regards,
Your Name.