Worst phone I have ever bought

I bought a Hisense U962 at Edgars Menlyn 25/08/2017. I use this phone work purposes only. The phone has Whatsapp and Truecall only as working apps. Yet the phone stops everything from working. I called Hisense and went the customer center. They want me to have a receipt. So I must walk around with a receipt. Now this phone doesn't work it crashing everyday. I went to Edgars Menlyn. They want to book it for two weeks. How will I make money for two weeks. Is Edgars and Hisense gonna pay for those two weeks. I don't want this phone anymore. Buying it was a big mistake. I just want my money back. I will never trust Hisense again and will never recommend it to people I love. I am very disappointed in Edgars. I have been buying phones from Edgars for years. This is a 1st time for me. I always tell people that Edgars products are the best quality cause Edgars always checks it suppliers. Wow to my surprise I was wrong. I guess it time to find a better store. I want nothing to do with Edgars again.