Intrusive exchange policy

Have found many useful and affordable items at Pep home over the past 2 months since being back in South Africa. Would give a 4 star rating, but it's a 2 star, because of an experience i had yesterday. Went to exchange 2 items, took a few other items in their place. I was asked, by the cashier, for my name, mobile number, ID number, and HOME ADDRESS!? why does pep want my home address? And my ID number? For an exchange?! I find this to be incredibly intrusive and unnecessary, and apparently im not the only customer to complain about this. Sadly, unless things are put in the social media space, nothing gets done about it. Even wanting my mobile AND ID number was an overreach. I had returned the two items exactly how i had bought them on Sunday, with the slip, so i don't understand the reasoning for collecting such personal and private information?!