Returning Seagate hard drive brand new

I think its shocking service at game that you buy some thing brand new a 2tb Seagate hard drive in December thats been used twice at the most... that now won't work keeps coming up with errors it reads then stops working them does not pick any thing up....just to take it back to game pintown to change it just to for them to tell you it will take 21 days to assess the device to see if they will then replace it or not....for faulty device that's brand new and the worse part Is at the counter the lady booking the device in is handling the hard drive like its a toy that can just be bumped around very unprofessional and time consuming while waiting at the counter another lady came it in with the exact same size and make hard drive with the same problem all so bought in December....not impressed there was no problem when you look my money for the divices not impressed at all....and I know I'm not the only one........