Unformal letter /past simple, past perfect, past continuous

Hi Veronika

Thank you for your letter.
I wanted to tell you what had become last week.

On Monday afternoon I went to buy some food to Prior.
When I wanted to across the street a big black car had crashed, because he didn’t pay attention.
On the red car was broke back glass and fell away a license plate. Then a woman got out from the car.
When a men got out too the woman started to shout. Luckily nobody was hurt.
Later the man called the police. The police arrived in a minute, because the police station was near. When the police arrived they started to write a paper and asked how it had happened.
While they was arranging it I sit on the bend and I took some food. It was great funny.
Some people laughed at them.
Finally I went to the language school.
I hoped to see you soon. Give my regards to your parents.

Your John.