No one is taking responsibility

Last year in May I bought a Hauwei Tab at Edgars in Hemmingways East London. After a month it stopped working, and I took it back to Edgars in PE at Govan Mbeki, after a month of not getting any feedback from them it decided to take it back to the Edgars in Hemmingways in July, they brought it back on the 29 August saying it had been repaired, it only worked for a day, then it switched off again, i took back to them and have since not recieved it back again. No one is saying anything, when I call the store the Manager is not giving me any answers. I want my money back or a properly fixed tablet that's working. I have been paying for it every month and I am not even in use of it.