you recently bought a new computer for your flat but it did not work. you phoned the shop but no action was taken. write a letter to the shop manager

Dear Sir, I am writing a letter to inform you that I visited your shop last month. I bought a new computer from there. It is HP brand and it’s light grey colour while, selected new piece that item. I checked all features. After one month, while preparing my presentation suddenly it was shut down. […]