Truly disappointed

I bought a hisense U970 from kalahari last year in august, and i used it for 3months and the phone started giving me a problem, i called kalahari 1st attempt: i asked for the phone to be collected and i was told to go the website to do a return of the phone that was in december i went to the website which by then you could not do a return if the product was opened. 2nd attempt i called the lady i spoke to explained how i should do a return i did that and the courier guy came after 4Pm which i had already left for work. i am stuck without a phone and i have been waiting for the courier service.