Dear Sir/Madam,
>I {write} to complain about the poor service {which} I received in your
>restaurant. The birthday party was {} last Sunday.
>First of all, I found your waiters extremely impolite. Secondly,
>the food {which} we were served was cold and tasteless. The meat was
>unpalatable and underdone. Thirdly, the fizzy drinks {which} we ordered were
>flat and the coffee tasted quite terrible. The layer cake was awful.
>I felt very dissatisfied with the meal.
>I hope {that} you will give this matter your urgent attention. I {should} like
>to receive a full refund {wiadomo za co chcesz zwrotu pieniedzy}. I look
>forward to your prompt reply.
> Yours
>{faithfully,}
XYZ