Poor customer service

On the 18/12/2021 I've purchased a sneaker with Archive TFG online store made payment on the 19/12/2021 and transaction was successful. The 20th I get a massage saying my order is being cancelled I called TFG online store spoke to Rina and she advised the order is cancelled reason being item is out of stock but the item is in stock online and I demanded to speak to the manager because she couldn't explain when I told her that the item is in stock online. Rina first advised there is no manager available when I asked how is a business ran without a manager/ supervisor then she advised her manager is busy. I told Rina I'll hold made me hold after sometime I was transferred to Wendy and she advised my line is bad she'll call me back. It's 30 minutes now I haven't received a call from Wendy. I'm disappointed with the kind of service I received from TFG and it's not the first time I receive this kind of service. I'm wondering if TFG is doing false advertising.