Prosze o sprawdzenie listu formalnego.

Jeśli mógłby ktoś przeczytać ten list i poprawić błedy, byłabym wdzięczna :) Z góry dziękuję!!

Dear Mr Kowalski,
I am writing in response to regard to your advertisementa which appeard in "Cogito". i would appreciate some further information about your courses. I would like to learn English at the upper intermediate level. Do you offer such courses? How much is the whole course? I would like to ask you for kind accomodation. Is accomodation included in the course? Are there any additional services organize there, like trip? When is it organize? I would be grateful if you could inform me how long lasts course? What time do you start the course?
Your sincerely...

I am writing in response to regard to (albo jedno albo drugie, jak piszesz in response to - to nie 'in regard to') your advertisement which
appeard in "Cogito". I (I zawsze piszemy duzo litera) would appreciate some further information...
I would like to ask you ABOUT THE KINDS OF accomodation. Is accomodation included in the course PRICE? Are there any additional services organizeD, such as ANY tripS? When is it organize? (Nie rozumie tego, when - to znaczy kiedy - czy pytasz o dnie, czy godz tutaj?)
I would be grateful if you could inform me how long THE COURSE last?

Dziękuję Teri za poprawę
Chciałam napisać...
Gdzie organizowane są te wycieczki?

Terri :)

aha, 'gdzie' to 'where'
where are the trips organized to?
Which places of interest do you organize the trips to?