I wanted to check how has your experience been with Amex Platinum's transaction dispute been?

I purchased a $2100 Canada Goose Jacket and they sent me the wrong size so l returned it and they refused my return and said they've pictures of a stain on one of the sleeves. I had the jacket in my possession for less than 48 hours cu I could t return it over the weekend. I didn't use the jacket since it's 80 degree weather here in the Midwest and returned it Monday Morning. I've contacted Canada Goose multiple times over chat and they wouldn't give me an answer for over 10 days 7 business days and when they told me this over the chat l've been requesting official email communication which they've so far not done so even though they said multiple times that they will email me asap.

Since the item is over $300 I can't use Purchase Protection for clothing item over $300 so was wondering if how good is Amex been with such issues. Also Canada Goose's rep said over the chat they're sending me the jacket back. Thanks in advance for your reply.