I can't believe anyone would sell something that works this bad. I keep getting big black bars across the screen, not been able to log in to any of my mail and it doesn't use the 32 g sd card. I have spent a day tryptophan get it to do anything other than make me mad!
If you go to Settings, then Storage, then scroll down, is it not detecting the SD card at all?
Have you tried using any other SD cards to see if tis a problem with the card or the tablet? Do you have a computer you could use to try reformatting the SD Card?