"I contacted the local Huawei service center"
In which country?
According to the Huawei websites, the terms and conditions of the Gold Member VIP service apply to:-
*"devices purchased by users in the United Kingdom, France, Germany, Italy, Spain, the Netherlands, Belgium, Portugal, Switzerland, Ireland, Sweden, Finland, Denmark, Norway, the Czech Republic, Slovakia, Poland, Hungary, Romania, Moldova, Serbia, Croatia, Greece, Bulgaria, Austria, Lithuania, Latvia, Estonia, Cyprus, Macedonia, Slovenia, and Bosnia and Herzegovina who activate their Gold Membership within one month after the purchase date (as shown on proof of purchase). A valid proof of purchase must be provided."*
Note that the wording says 'purchased by users in'. It doesn't say anything about the warranty only applying in the country where you bought the phone.