If you've gotten a 14 day suspension, that means you're very far along in the punishment system, and any infraction from this point onwards might result in your account being permanently suspended.
You didn't specify what your account is currently suspended for, but if it's chat or conduct related and not because you're losing games on purpose, avoid chatting with your teammates in future games. Any angry or hateful chat by you that would justify a report is likely to result in permanent suspension.
Any chat you make should be brief and carefully worded to avoid being inflammatory offensive, and if your teammates don't listen to you, don't press them further to avoid being reported for harassment. If you can't keep your chat cool and brief, you might consider avoiding using chat altogether.