Hello i bought an electric can opener.on the 21st of july 2010.unfortunately it has broken.it will not open the tins.Ihave arthritus in my hands and have had this type before.i dont know whats wrong with it.As it is still under manufactures guarantee could you please make a refund.It has not been working for a few weeks and had to go out and buy another as i can not use any other because of my hands.thankyou.