55\ Sansui TV waiting for repairs after 37 days"

My 55\ Sansui TV has gone in for repairs for a 2nd time within a period of a month & a half and after 37 calendar days OR 26 working days I am still waiting for my TV. I have been contacting HiFi Corp on a daily basis and all that I am told is that the spares haven't arrived. They keep telling me that because the TV is on an extended warranty I just have to wait until the spares arrive. Last week the spares arrived and only to find out the wrong spares were delivered (WHAT A JOKE). That is totally unacceptable and I believe I have a right to demand that I am refunded back my money for my TV so I can buy a new one at a different shop