Terrible inconvenience caused

I bought a TV from Sinotec and it had a "out of box" fault. I notified the company and they said that they will collect the TV. When they collected the TV they informed me that they will first have to do a credit note before they can give me a new TV. Therefore i have no TV and therefore cannot watch anything at this point in time. They are also failing to advise when the new TV will be delivered. It is shocking.