Unwilling to help with defective item

I recently purchased a Hozelock timer for spraying my garden from Builders Warehouse Constantiaberg, the box has a serial number which matches the fact that they indeed picked up this item as one of their own and of course without any refutable proof is the same one I have, which proves that this item was bought from them and not elsewhere. They refused to help me because I lost my invoice. <br> I decided to call the agents for Hozelock which by the way are the same agents for Ryobi in SA, a very understanding gentleman who happens to be the director was shocked to hear of their terrible dealings and gave me the go ahead to go and get resolution at that particular store in Constantiaberg.<br> I called Anelise to see if they had new feedback regarding my case and she just told me \sorry there is nothing we can do without the invoice\", I said \"are you sure you want to go there?\", she asked \"what do you mean?\", that is when I told her that the local agent just gave me clearance and you aught to sort it out tomorrow. How embarrassing!!! Useless bunch. "