It's okay for Foschini to sell items that don't have tags or have paper tags that were printed but not okay for customer to get assistance when the tag and slip is in the plastic but isn't attached??

I bought an item at Foschini kolonnade before closing time, had no time to fit the item, and I know to exchange or get a refund I should have the slip and tag, the tag is not attached to the item but was in the bag. Since I live in Brits I went to Foschini in Brits Mall to get assistance, i was told they can't assist me because the tag isn't attached to the item. Now my issue is I can find items in the store that don't have tags in any Foschini store, so it's okay for the company to sell us items that don't have tags but it's not possible to get assistance when my item has the tag but isn't attached and I also sent an email to customer service TFG and no response was given. Or should i go take pictures of the items that don't have tags ??