Motorola Moto E — call divert issue

Hi all
Am using vodafone in my moto e handset for cal divert I tried all possible setting mannsuly from handset getting errot as unexpected response from network even I tried used code **21*phone number# also getting error as invalid mmi code or network error am getting so even i tried differnt handsets also i couldnt able to that for this spoke higher level of vodafone management they could not help.. So plz assist me if anyone have knowledge on this.

Am using 5.1 lollipop