COOFANDYMen's Fashion Fashionable

I got this for my partner's birthday so he didn't open it until about a month ago.I have tried so hard to contact the seller or initiate a return and Amazon makes it impossible.The stitching is not great on this product and I'm hoping I just have a faulty item as the colour, fit, and look of the cardigan is great.There is a clear hole in the shoulder that has formed and there are other areas where the stitching looks loose so I'm hoping for a replacement as £30+ for a cardigan that lasts a month is no good.Please message me if possible to sort out a replacement and I can then change the review because I never write bad review like this. Again I'm hoping we're just extremely unlucky.