Repairs/Refund of a device bought

I had a unpleasant service from the first day 02/07/17. It all started with the false adverti*****t when you purchase a Hisense u972 you'll get speakers of which i never received. I've been using the phone and it's been giving me problems from the first day of usage, the battery doesn't last long it doesn't wanna charge at times and recently it didn't want to switch on.

On the the 9th Dec 2017 took it back to Jabulani Mall for repairs they said they will get back to me within 6 weeks in which they never got back to me in that 6 weeks.Then on the 20th January 2018 I went there to enquire about my phone and I was assisted by Tebogo and he told me that my phone hasn't been brought back from repairs he will call me Monday of which he did and he told me that the phone is damaged of which the phone has a software issue and today had to wait for more than an hour plus for a Shop Manager to hear my story but to no avail was told s/he is still busy receiving some stock till I left.

So I need my phone urgently in a working condition because I bought the phone for some business purposes and I can't wait any more further, it's either they give me a new phone or refund me.