Levi's terrible service, no exchange done, no refund received.

I had bought a denim shirt , which I received was delivered late, but because I liked it, I waited and considering that there would be backlog because of lockdown , I understood. I called to ask if I can return it as it was late to make returns, and they gladly said they will inform courier company to collect it and will assess it and then exchange it for a smaller size. The courier came on the 31 July, it was delivered on the 4th August to Levis, but I was later informed that it was delivered on 07th. I have been following up, and have been misled by so many of their staff, I was eventually told that they don't have stock of XS, and that they will maybe give me a refund, I then told them, it's fine, I would like to receive my Small size shirt, as I will alter it, but there was no response in mail. The last lady I spoke to told me that they will most likely refund me, I am still waiting up till this day. Levis kindly do the right thing. Thank you