Hisense dual sim

What an appauling service from Cna Clearwater.firstly i bought a phone on the 27th jan it was not even a month old when it booted itself and stopped working.I took it in on fri 15th feb A lady by the name Jabulile assured me that it is not a major issue and her colleque will be able to fix it the following day.She then promised to phone me on sat as soon as it is fixed.sat sun monday no phone call from her.I tried phoning the store today a several times nobody answers the store telephone .Cna clearwater what kind of a business are you running what is the point if you can't take your customers seriously.Here i am waiting like a fool for a phone i paid for it is not even a month old yet it is being fixed.I demand my money back