Returns policy

I am gutted with I services I received last night when speaking to the manager on duty Glanger at Pick n pay hyper in ottery.So I bought a Russel hobes iron early this year and the iron just stopped working in this week.I still had the original box and manual but could not find my slip.When returning the iron I was told that you cannot return the iron without a slip.So who in this darn age is going to keep a slip for a iron.As im explaining my complaint to the manger his work mobile phone rings and then answer the phone whilst speaking to me,where is the customer service here Pick n pay.So he plugs the iron in,the iron goes on,I explained to him that this is the problem I am having,the iron would go on one day then not the other day.My point is that why cant Pick n pay go the extra mile for its customers by looking at their own records as to when I purchased the iron,surely as a huge organization they should keep records for at least 5 years.All I want is just for an iron that is in good working order.I dont even mind if Pick n pay sends the iron away to look what is wrong,if the problem can be fixed then I will be happy.I am unhappy ,my iron is not working,i dont have a slip but hope that Pick n pay will look into their returns policy.I hope the highest person at Pick n pay reads this