Non Delivery of Goods after taking the Payment

I ordered something on the 26th of January and made payment immediately. It appears that there was stock at that time of my order. On the 25th of Feb after much waiting and numerous calls which have not gone through, they respond to say that they dont have stock and will deliver by the 10th of March. They promised me that delivery would take 3 weeks, from there its now gone to 6 + weeks. Yoh! I am absolutely shocked at their service. And they not shy, after taking the payment, they say I have to wait another 3 weeks, God know if I will eventually receive anything. I dont think so. I warn customers not to purchase from this business pls do yourself a very big favour and stay away.