Horrible experience!!

Twice in a row they have messed up my order. I ordered and paid for a whole bunch of tiles which they confirmed were in stock and accepted the order. I sent my bakkie the next day to collect the order and they said they sold the tiles to someone else and I MAY get the tiles in 4-5 days if I am lucky. Then the whole run around for the refund!! I again placed an order for some edging strips which showed 20 in stock on the website. I needed 8. Order accepted, delivery date set. No updates and two days after delivery was due, when I followed up they have the cheek to tell me that they can offer an alternative!!!! Either the systems are completely messed up or the staff/management don't know what they are up to! Horrible horrible experience!