I have tried calling the 3GX customer service but I never get a rep. Just a recording asking me to wait. Can someone tell me how to cancel the service please? Do I have to go into an office? If yes, where? Is there a fee for canceling? I am still on my three months free for buying the phone. I find the service inconsistent (some areas of BKK no internet) and cannot use up-country. I want to switch to AIS SmartPhone package.