Bad /worst

Worse customer service ever My sister bought a sunbeam griller which on on on special for R200 on the 18 nov 22. It was used on the Sunday and while use just went off death ...no longer working I then had to grill the meat I was busy with in my stove delaying a whole lunch. Seeing that my sist works there the security checked the item and threw the slip away in her hurry it actually slipped her mind that she needs the slip hence the appliance she bought. Anyway I went back to return the item which they actually know she bought and was asked 20 questions by a manager denathan or whatever his name is with a very bad attitude explaining to him that I do not have the slip and that I don't want a refund just another griller seeing that they know my sist bought it there...this is now the 3rd day ...they are now busy checking footage ... Now I ask you is this customer service if they treat customers like this and a every day worker on site in store is this a place we need to buy at my money is good when i buy but when an it is returned you have to struggle ... This is not the 1st time also a lady got a refund of R700 without a slip when she skelled and made a scene so do I also make a scene I order to be assisted Bad bad service not the 1st time something like this happens at pick n pay Gordon'sbay... Would not recommend people buying there Dissapointed is not even the word