Bad customer service

On the 25th of February 2018, I bought a sumsang tablet at Westgate shopping centre. I was told that they only have the one on display, I bought it because I had no choice, my daughter needed it for school. I was couldn't insure it at that time because I asked what I needed to bring to insure it, I was told that I needed my bank statement and the receipt. I then went back on the 11/03/2018 with the documents they said I must bring and I was told that I needed to bring the device aswell, I told the ladies who were assisting me that I was told bring these documents only . I told the ladies that the device is with my daughter and she is in boarding school she will come back when the school closes. The lady (Xoliswa ) said I can come back on the 30th and they will insure the device. They told me that the person who sold me the device does not work at that department hence he gave me the wrong information. I don't want any stories when I come back to insure the device because you let a person who was not trained for that department to give me false information.