Poor service after poor quality bricks delivered

Bought Bricks from Chamberlain Centurion and and they delivered the bricks. After delivery I reported that there were alot of broken bricks. They then referred us to their supplier who came out and counted the broken bricks. The supplier then said he will request Chamberlain to replace 750 bricks. I sent an email to the manager that reached out to confirm that supplier came out and said he will request Chamberlain to replace 750 bricks. In the email I mentioned the bricks the supplier said he will request to be delivered. The manager said the bricks will be delivered on Wednesday. I asked for the bricks to be delivered earlier as the project is being delayed but that did not happen. Bricks were also not delivered on Wednesday as per the email from the chamberlain Manager. Upon following up with the manager from Chamberlain he said bricks will be delivered on Thursday. After no delivery again on Thursday I purchased bricks at another place as the project had fallen behind. I then asked the Chamberlain manager for a refund. The manager then said he will only refund 500 bricks and that he didn't say he will deliver 750 bricks yet the whole time before I asked for a refund he didn't question the 750 bricks. Instead kept saying they will be delivered but when I ask for my money back suddenly only for 500 bricks. Also no where on the quote or invoice did they mention any 10% breakage. The supplier before leaving said he will request to replace 750 bricks and that was communicated to the manager who is now saying only 500