Do you a seller? you supposed to know about "Il cliente è un re"

Rrggh i was dejected with someones mm.. Call her 'S'
I just called her for confirmation the '9000' but she answered impolitely! Its make me so dejected. If you want to sell something, please show your kind demeanor. So that you get a customer!
Finally, i canceled the contract with her for buy a '9000' !!
i can buy in other places