Cancelled order on delivery day with no prior warning!! :((

I ordered 55 square metres of Jura grey limestone and only on the morning of the delivery date did someone bother to call me to tell me that they did not have the stone in stock, that it was a 'special order' (no-one mentioned this when I put in the order and paid the money) and that I would have to wait for at least a week for the order to arrive from Germany. I was told via e:mail that someone would look into it and try to resolve it, possibly the tiles would arrive a few days late. But after 3 calls to speak to someone to escalate to the owner, no-one called me back.
The next day I was told that due to short staff in the warehouse, my order would be delayed by 2 weeks and that they were going to cancel the order and refund me!!!
Given that I a in the middle of a build with several suppliers and tradesmen lined up, this was a huge shock to me, but no-one seemed to care or to be prepared to do anything to sort out the issue which was 100% the fault of the company.
Luckily I phoned around and was able to find several other companies that kept a good stock in their warehouse - why could Travertine Direct not do the same and why did they not mention this when I placed my order?
Shame on you for causing so much unnecessary stress and for not pulling out any stops to try to resolve your screw-up / leaving me to fix everything. All I got was a refund and no apology.
Recommend avoiding this company and using another one that has adequate stock and customer service that looks after the customer.