Ultra decoder hard drive

So my brand new Ultra Decoder hard drive isn't working properly. We took it to the branch, they reset it then it works for one day, took it back again, reset then again only works for one day. I reported to head office and they said I must go back to branch for a new decoder. I pay for Premium and insurance. They can't give me a new one because of stock. So every week I report and still mo stock. Which is funny because if you buy one they have stock. So I report it to head office again. They tell me I must go to another branch. Closest is 40km away.... Then I report it again, complaining that I pay for a premium service, which I can't use, I can't use my stop, rec, catch up or any of my apps. Every time I give it a decoder format, every is lost. And all they tell me is they don't have stock or call the head office.