Hello Mrs S, how have you been? xD
sorry your fish haven't been getting visually better, but!
I'm almost positive you are doing 100% daily water change together with the epsom salt treatment, am I right?
As Creat said, what is the dosage you are using? You may want to do a 3tsp per gallon if you are thinking he isn't getting any better, try giving him a bit of food since he didn't eat in the last 14 days, just to make him slightly better.
Here are some of the photos you sent to us:
The first photo:
And the photos from last week:
Now, is it just me or his left side is a lot bigger than the right?
Because on your last post it really seems like it, specially on the other photos if you pay attention:
Also this is a close-up from that photo:
The circles indicate the white poop from your fish, I think that might be parasites.... Also.. I think he's rather pooping a lot daily, if that's his daily poop.
But yeah, can you remind us the dosage you are using on the epsom salt? You might want to buy something for internal parasites as well I think... Let's wait for some experts to reply :P
And I hope he gets better, don't lose your hope! He's a real fighter, you might want to rename him as a Goldfish after this drama.. hahaha. =]