I am assuming you have also bought a Chinese Tencent model with "International ROM / Global ROM" preloaded by the reseller? This combination is not something we support or sell officially and as such there can be many related issues.
Check the backside of your phone. Does it say Tencent anywhere? Check Settings-> System -> About Phone Look for "Software information" and check the firmware version , if it is "WW_" you most likely then have a Chinese phone with the non-chinese software , preloaded by certain resellers..