This business letter is correct and polite enough?
Dear
I would like to let you know that I have not received the ...........'s Intermediate coursebooks yet, which had sent in 8th of September. Can you please suggest me the contact number number of parcel and etc?
Best Regards
Dear
I would like to let you know that I have not received the ...........'s Intermediate coursebooks yet, which had sent in 8th of September. Can you please suggest me the contact number number of parcel and etc?
Best Regards