very poor service

I am utterly disappointed at the service that truworths head office has given me, I ordered an item exactly 1 month ago and I was told that it would be delivered in 3 weeks at most. after 3 weeks of no delivery I called to follow up and I was told they would get back to me, I waited another week and still no response, I then called again and they told me they don't know what happened but I wasn't going to get my order because they ran out of sizes and all this while no one bothered to call me. they also have the audacity to tell me that they cant change the item I have because I have had it for over thirty days meanwhile they failed to deliver so I could make an exchange and they gave no feedback regarding the order. what annoys me most is that this is not the forst inconvenience they have caused me. they once deducted my account twice for no reason and I had to fight to get it sorted out even though they could see that they had made an error, they refused to own up. they seem not to ever have a solution, only excuses!!!