Advice Need,Please.

[Everhelpful]

I bought a Hisense TV from Argos on 7th.December. After I set it up I noticed the Picture was faulty and Volume had to be turned up to 22 before any sound. I contacted Argos about a Refund and they said I need a Code from Hisense. The reply from Hisense was: Supply photos of TV,on and off etc,I have done this,now they want a Video of TV working. In short,after numerous messages, I get the impression they are just putting obstacles in my way,so they don't have to give me a Code. What can I do? Thank You for any replies.
Sorry it is long-winded but needed to provide as much information as possible.

[jno]

it doesn't mention fault, Everhelpful, just "if you've changed your mind".

[Everhelpful]

Will try that,jno,Thank you.