Horrible customer care regarding check in and lost bag of Qantas frequent flyer

The lady who had to check in my luggage at the Qantas counter at OR Tambo in Johannesburg, South Africa was extremely rude and failed to give me a tag for my luggage. I was so upset with her bad attitude and lack of customer care that I didn't realise it at the time. When I arrived in Wellington, New Zealand my bag did not arrive. Fast forward one week later and still NO sign of my missing bag. No one knows where it is and has been able to locate it. This has really affected my opinion of Qantas Airways and in the future I will think twice before I book with Qantas again. This is not the way to treat your Frequent Flyers! I expected more from you.