They dont stand by and guarentee their product

I ordered 96 tiles, Of those delivered, 51 where chipped (thats more than half) and could not be used. They could not replace them as there was no more stock. I had to fight for a refund, while my renovations continued. The good tiles had already been layed (thats when the tiler noticed the defective tiles), and when they could not replace the defective tiles, we had to be lift the tiles already layed, you cant have 2 different tiles on a floor. They collected the tiles and then complained about the state of the tiles returned (it had been layed). Eventually, after 2 weeks, they refunded the tiles, but excluded the delivery costs and the cement used. I should not have lost money due to them delivering defective tiles. I already had to pay the tiler twice, to repeat the job. Am I unreasonable for expecting a full refund?