Bad service!!!!!!

So we bought a 55 JVC Smart TV at Game Cradlestone on 20/03/2019 (We paid for rhe TV at Key West but went to Cradlestonefor the TV as they had stock). Everything worked quite well. On 3 August I phoned Game to tell them that there is a fault on the TV. Detailed description of the fault: When the TV is turned on it says JVC and then loads to the next thing that says Wisdom - Share Smart Cloud TV and there it stays loaded untill forever. You can only shut down the TV by pulling the plug. So this lady arranged for a technician to come out as the TV is 55". The technician came out on 13 August. He did some update on the TV so it worked but only untill 23 August then it did the same thing again I contacted the same person via e-mail to inform them about it and that they must please send out a technician. The technician came out on 3 September and replaced something in the TV. Now when we watch Netflix is starts to feeeze every now and then and then the whole TV screen turns black and after a while it turns blue. After that it takes us back to the home screen. We are really tired of this. As we can't watch television. I phoned Cradlestone on 6 September to inform them about the fault and that I want to speak to management otherwise I'm going to write a review on hello Peter. The lady said someone will phone you within the next hour no need to write something on Hello Peter. Untill now nobody has phoned me yet. I want a refund not a new TV a REFUND!!!!