I have Snapchat on my android tablet but the camera both front and rear are upside down and back to front I have tried changing all settings but nothing is happening
Welcome to Android Central! Which tablet? What do you mean by "back to front"? Do you mean that then you select the front-facing camera, the rear camera is what's activating, and vice-versa?
Are you the original poster? Which tablet? Is this the front-facing or rear-facing camera? Is it this way only in Snapchat, or even when using the stock Camera app?