Bad service

on the 19th of August 2015 I had gone in to the store to purchase a tablet for my son it was not even 2 months old yet when it stopped working. there was no power at all. I took it back to Hifi Corp in Richardsbay on 25/10/2015 although I did not have my slip I went to the bank to get a statement which shows the day and the amount of what was purchased. the lady said that was good enough proof. now they have changed of programs so she cant reprint the slip for me she had to send my statement to head office in order for them to reprint a slip and the lady informed me by the next day I would have an answer. 2 days went by and I heard nothing I had to phone in myself to find out what was going on and she just informed me that the technician is busy with the reprint, can a reprint of a slip really take 3 days??? I then went into the shop again on Wednesday 28/10/2015 now they told me that the lady is on leave so there is no one else in the entire shop who can contact head office to find out what is going on. I then myself tried to phone head office on *** and can you believe it the call just says transfer cant be completed. this service is really really bad!!!!