Adidas just messed up my whole december in 2weeks

I made a purchase from adidas online. The parcel was taking longer than usual so i sent an e-mail to their client care. they however never responded to it. the sale was made on 23 november 2018. on the 10th i called their call center and the person i spoke to said i will receive my order the following day which never happened. i called again and they told me the same story and promised to call back again which they never did. this continued 5times with the saying they will call me back again and NEVER DID. Nor reply to my email. until i had to ask for the manager. who confirmed my order is lost and they need to do a refund. i opted to buy at adidas considering they had a sale. now the sale is gone. i need to buy other stuff with a bigger price. on the 20th, almost a full month for them to attend to me. Taken from pillar to post. Sooo disappointed. Adidas do not value its customer at all. I cannot even find now any sizes for my son and thanks to Adidas. what am i to do now? was set up by this sorry company to be like a bad parent. I hope nobody buys there ever again, unless if they are ready to go through the emotional distress i went through.