poor service

This is a second time in two years I have purchased a eco heat electric blanket that dis not last the 12 months guarantee period . It stopped working and I was requested to bring a receipt from last year.if I am unable to produce a receipt then I have to purchase another blanket?? Yet I used my makro card when purchasing. No one can help or is willing to help me. This is ridiculous a king size blanket costs a lot of money