请帮忙修改下英文道歉信,直接改给我就好了,内容不恰当的也帮我修下下内容

请帮忙修改下英文道歉信,直接改给我就好了,内容不恰当的也帮我修下下内容
Dear Sir
I have received your letter of October 17 and regret that I wear the wrong shoes and not hair tied up.
I am aware of the consequences of this.But I honestly would like to let you know the cause of this.Last Sunday,My shoes were very dirty because my brother he is 3 years old .So I can not punish him.Afterwards I clean the shose until went to my grand mother home .When I was go home .I was crazy.My brother painted the color of my shoes.I think tomorrow is not to this shoes ,but I have a pair of sports shoes and a pair of dirty shoes.SO i choose a sports shoes .As for my hair was not tied up because I not paying attention listen the announcement.It is my mistake,not excuse.
Please give a chance and i assure that i will never wear wrong shoes to school again,ever.I sincerely apologize for what i have done,please forgive me.
Yours truly
Annie Chan