Hi there, with regards to the Dischem bag its really quite nice, I got mine at 25 weeks though, and we had to spend R400 - not sure if this is store specific or something.
I added a pic...
I am not sure where you can get random free samples, however you get with the Dischem baby program. You have to have a Dischem card and spend R250 or more on your card to join the baby program. Once you hit your 3rd Trimester they will phone you to collect your bag.
Someone in my group said it's and awesome bag, everything you need for hospital is in that bag and it also looks like a pretty bag.