Dear Sir or 'Madame' MADAM,
I am writing to enquire 'about few information' (to masz niezgrabnie, bo to 'about' 2 razy nie pasuje - lepiej ..writing to obtain further information about...) about THE service which you provide.
'It very interested me' (zla kolejnosc slow ...It interested me very much).
First od all I want to ask you to send me A catalogue and 'payroll' (calkowicie zle slowo - nie wiem co masz na mysli) of your firm.
Secondly, could you please send me also further detail About YOUR payment terms?
Or maybe you award some discounts for placING A big order?
And there is one more thing, I would like to 'konw' KNOW 'how' WHAT is the fastest delivery date.
'I am' (generalnie piszemy I look forward) looking forward TO HEARING from you.
'Yours sincerely' (jak zaczynamy list Dear Sir/Madam, to konczymy Yours faithfully, a gdy Dear Mrs Smith.. to Yours sincerely)