I'm sorry to hear you're having this issue. The most common cause of the dryer stopping before the clothes are dry is that the vent is clogged or restricted. Be sure to clean the lint trap frequently (it's a good habit to clean it after each use). Though you've had it installed only a couple of weeks, I would suggest checking the vent ducts, especially if you connected the dryer to a previously-installed venting system. Samsung dryers, like many others available now, use a powerful blower motor, so any residual lint in the vent pipe will be dislodged and could cause a restriction by collecting in bends or elbows. An easy way to determine if this is the cause is to remove the vent pipe from the back of the dryer temporarily and try drying your laundry. If the dryer runs continuously without turning off, your vent system should be replaced.
If the dryer is not heating during the few minutes that it's running, it may not have sufficient power, in which case you should confirm the electrical supply is 220V, 60 hz with a 30-amp dedicated outlet or circuit breaker.
If the dryer is heating but still shuts off early, then it will probably require service. If this is the case, you could contact your local Best Buy appliance team or call 888-BEST BUY for assistance; or you may call 800-SAMSUNG to speak with an agent who would be happy to help you schedule service.