Hello there 3DXChat Community!
Due to popular questions being asked in game and Forum by people up on how the subscription system works, I shall write here, explaining how it works in detail, for information to you all so you all understand clearly how the subscription system works for the future.
The subscription system is an interesting one. If you still have an active sub, do not activate any new subs at that time, because it will overwrite it and you'll lose your remaining days on your presently active sub.
Also, if you're on the recurring sub, please cancel it and wait for your current sub to expire then you can activate your new subscription plan/pre-paid codes.
To cancel a recurring subscription fee, please go to here and use your details given to you on your receipt of purchase, not the login details of the game, but the details sent to you in email from BMT Micro, confirming your subscription plan. (Usually with your Order ID etc...)
Then once that is cancelled and you can no longer log in the game when the remaining days of your cancelled sub are over. Go to here and copy and paste your subscription code in the code box and make sure there are no spaces before or after the code as it will come up as invalid. Then write your email of the account you currently log in to the game with. IMPORTANT: Make sure your email is correct, letter for letter, number for number. And the correct web extension .com , .co , .net etc... As one error can make you a whole new account and you'll then need to contact support to fix it.
Also it works for the recurring subscription plans here. I hope this helps, although the support center explains some of this, it doesn't explain it in full details, which is why I am writing it here for you all to read and understand.
Hopefully it will save some of you guys and girls, from losing days you already have saved as I have seen people lose weeks worth of days due to their thoughts thinking the subscription system would extend and "Add-on" the new time on their current sub, but this is not the case.
P.S. The Pre-Paid Cards never expire, so don't worry that you may have to use it in a certain time frame, once bought, the code is valid forever, until used.