Disgusting customer service experience

Bought my goods on Sunday August 30th and expected delivery the Tuesday as i was told. Tuesday there was no delivery only a call telling me one of the tiles i bought was out of stock, not sure how i paid for something that's out of stock, but was asked if i wanted the colour that was next to the one i chose. I told him i wanted what i paid for was told they dont know when they getting stock, i further asked if they can borrow the 5 boxes from another branch was told i would get a call back. Only Thursday the 3rd delivery was made without the 5 boxes. Have nit received any call back from anyone went to the store 8th Sep and was told by management hes busy with stock taking and the supplier is not answering his calls, he cant borrow from another branch he will call me the following day. No apologies no remorse only bad customer service. I still haven't received a call from the manager so i called yesterday the 7th was told deliveries would be made Thursday so i asked the guy am i getting my 20% off as per website he said he will ask the manager and get back to me. Its Friday the 9th today and still no call or delivery just disgusting customer service and empty promises.