sprawdzenie krótkiego listu oficjalnego

hej, muszę napisać list oficjalny. proszę o sprawdzenie błędów, dzięki :)

I am writing in connection with special offer at Al-Munir hotel. We have beneficial promotions for you because you are our regular customer.
I would like to describe our offer which will be still standing for the next month. Firstly, you can use the swimming pool and the sauna for free. During the week's stay you also can take advantage of special treatments in our spa. When you will rent the luxury apartament you are entitled to a great drop. Our staff is guaranteeing you the professional service and the convivial atmosphere.
I hope that our offer is for you interesting. We are waiting on you another visit in hotel.

Yours sincerely
Jenifer Duncan

I am writing in connection with (przedimek) special offer at (przedimek) Al-Munir hotel. We have beneficial promotions for you because you are our regular customer.
I would like to describe our offer which will 'be still standing' (nie, nie tak, mozna 'available') for the next month.
When you 'will' (niepotr) rent the luxury apartament you are entitled to a 'great drop' (tego nie rozumiem). Our staff 'is' (niepotr) 'guaranteeing' GUARANTEES you 'the' (niepotr) professional service and 'the' (niepotr) convivial atmosphere.
I hope that our offer is 'for you interesting' (zla kol slow, najpierw 'co' a pozniej 'dla kogo'). We 'are waiting' AWAIT 'on you' (niepotr) YOUR 'another' (niepotr) visit in (przedimek) hotel.

Masz problemy z przedimkami. Musisz sie ich nauczyc.
Jenifer Duncan[/quote]