you have recently returned from a trip by plane with AngloAi

you have recently returned from a trip by plane with AngloAir airline.The flight was dreadful and the service was appalling.Decide what you want to complain about and what compensation you want.Write to their head office in London:AngloAir,Customer Relation,156Parr land,london W5 3SW.
根据短文内容写一封完整书信,确定收信人需要知道什么信息,你的要求是什么

October 17,2008
...(your name)
...(your address)
Beijing,China
xxxxxx (your postal code)
Customer Relations Department
AngloAir Airline
156 Parr Land
London,Britain
W5 3SW
To Whom It May Concern:
Re:Complaint of Flight A7-57 (the flight you took)
Dear Madam/Sir:
I was a passenger on flight A7-57 from London to Beijing on Oct 10,2008.I hereby write to you about the dreadful flight and appalling services we had received on the said flight.
First of all,since the take-off,there had been "technical difficulties" with the audio system therefore there was no music played or movies enjoyed.When many passengers started complaining about these "difficulties",no flight attendent attempted to comfort them by bringing additional entertaining materials such as more magazines or newspapers other than the only magazine tugged in the seat pocket that was full of advertisements only.This was a over 13 hours long flight.Being an airline such as AngloAir,one would think that technicians would check all the systems to assure their proper operations and prepare alternatives should such "emergency" happen.But no.One would also think that there at least would be some explainations or appologies for such a mistake from the flight attendents,and the technicians should try to repair the system while having all passengers informed of the repairing process,but neither.
Secondly,while every passenger was already very unhappy and bored from the "silent flight",they were not only not treated with extra attention and care,but did not even receive any regularly expected services.When I tried to order an apple juice,for more than 30 minutes there was no attendence walking down the isle taking any orders,so I had to leave my seat,find an attendent who was talking with another idly and order it.After 10 minutes that I placed the order,and sat back in my seat,the beverage came,but a wrong order.Instead of the apple juice I ordered,I was sent a milky drink.When I told the attendent that I am alergic to dairy product therefore could not possibly have the beverage,she told me with very cold voice:"but sir,we unfortunately could not offer you the apple juice,for those are reserved for only first class passengers."
I was astonished to hear this answer.Being a customer oriented airline like what AngloAir always advertises itself to be,passengers should at least get the satisfactory treatments,instead of being rejected for such a minor request.Moreover,I felt being despised for not taking the first class.I strongly suggest your company review the training of your flight attendents for their attitudes toward passengers and customers,for they had not left me the impression of being courteous and unbiased to any passengers.
My flight with your company was horrible for these reasons.I had not enjoyed the flight as I expected to have,in fact,this was the worst flight experience I have had for over 10 years,taking over 50 airlines' services.I demand a response from AngloAir to appologize for the dreadful flight,also a complementary round trip from London to Beijing to compensate this horrifying experience.
I can be reached via telephone at xxx-xxxx,or via e-mail at xxx@xxx.com.
Yours,
xxx