No refund after almost 3 months!!!

I am fed up , I purchased a phone from Kalahari in December as a present, it worked for 2 days after which the screen went full of lines and stripes, i requested a return, the phone was collected 1 full month later!!!!! after which they told me it could take up 2 two weeks for a replacement, i waited another full month!!!! I contacted them and told them i need a refund and i will purchase another phone from their website as i cannot wait any longer . I purchased another phone it arrived , all good, 2 weeks later the same damaged phone (being fixed) !!!!! what the hell is this???? first off you took 3 months!!!! since december, secondly I DID NOT HAVE THE PHONE FOR LONGER THAN 2 DAYS, and thirdly i requested a refund, not a fix me up phone, Now they say they will send the phone once again back to the factory for assessment!!!! this is the second time you are sending this phone, i have told you I BOUGHT ANOTHER PHONE FROM YOU ALREADY!!!!! i want a refund!!!!! Reference number ***....