Excuse me do i know you? You have rang me but I dont recognise your number.Who are you?

Pardon ama seni tanýyormuyum?beni aradýn ama numaraný tanýmýyorum.kimsiniz?

Hi

you used ´seni´ at the beginning of the sentence... so shouldn´t it end with ´kimsen´ rather than ´kimsiniz´?

regards

Tony

or sen kimsin 

Pardon ama sizi tanýyor muyum? Beni aradýnýz ama numaranýzý tanýmýyorum. Kimsiniz?

(it is better to use "siz" instead of "sen" when you are talking or writing to someone you don´t know)