Poor service

I bought a new Russell Hobbs iron which died the 1st time while doing ironing. When I return it to the shop, they refused to exchange it instead they telling me it has been fixed due to the fuss which was dead due to failure on running its quality tests before sending the product to the shop I need my new iron, and I am not going to take the tempered iron back. Menyln store manager is so disgusting, unprofessional who doesn't want to be accountable