Pathetic service

Firstly I send my son's PSP to CNA, where they informed me they need to send it to Partserve for repairs. After 2 weeks it came back, went home and charged it to see that it still has the same problem not charging. I contact CNA and asked them why it was never fixed they informed me that they were not told by Partserve that it was not fixed. I contact Partserve myself and complained that why is it that they did not fix the PSP where they told me they do not fix the PSP's they replace it and I have to come from Kempton Park to Sandton to bring it to them. Firstly I cant just take off secondly I did not mess things up so why should I bring it, I spoke to Shouneese who said they will come and fetch the PSP by my work. They came to fetch the PSP at my work on the 23/04/2015 and up until today they haven't contacted me or send me the new PSP. I phoned them in the morning and after speaking to several people and having the phone dropped in my ear 3 times they eventually said they will contact me back where I am still waiting. Imagine you have a 9 year old asking you every night when is his PSP coming and you don't have answers. I want answers and what they going to do about this!!!