I REGRET BUYING A PHONE FROM CNA

I bought a phone at CNA Clearwaters from a very friendly staff member, 3weeks later the phone was not charging and not switching on anymore(which happens, its a gadget), I then took the phone back to CNA Clearwater, where I was informed they cannot assist me without the box and accessories plus a slip, I went looking for all this then took the phone to CNA Rosebank where I was told they only need the phone and slip, already I could tell that CNA staff members don't know what is needed exactly, I didn't have a slip but as I had purchased the phone with my EDGARS account, it was easy to find proof of purchase, I left my phone with a very confused Palesa at the CNA in Rosebank, she informed me latest my phone would be returned in 2weeks. After 2weeks I receive no feedback, on follow up Palesa informs me that the phone is at repairs and now she tells me its actually 21days! At this point, I am not impressed as I honestly feel that the staff really don't know what they are talking about and are simply guessing. 21days come and go and again I call CNA, at this point, Palesa tells me that they need the slip and she will get back to me, now this is getting upsetting, I resend the proof of purchase and wait for her call, but instead, another week goes by! at this point, CNA has had my phone for over a month, I again call CNA and Palesa tells me that my phone was only actually starting to be repaired on the day I sent the proof of purchase, meaning no follow-ups were ever made by the repair shop nor by CNA, regardless of the fact that I have been calling and checking. I am so dissatisfied with the level of service and it is unfair that I should now be punished for two months with a phone I bought from CNA.