Zee Tv — I want to update my mobile no. into my gmail premium account on zee5

I have a account on zee5 with premium and that is connected to gmail and my gmail is Anubhav.[protected]@gmail.com and I want to update my mobile number into my premium account . But whenever I do it says your mobile number is already in use I have complaint several times but i got no response please update my mobile number [protected] to Anubhav.[protected]@gmail.com
I will be thankful to you