WELCOME TO THE FORUM, MUMZILLA
Sorry to hear about the troubble you went through
Well, if Pimafix and Melafix don't work, I do have a "shotgun" for just in case: It is called MultiCure by VitaPet, it contains Acriflavine, Malachite Green and Methylene Blue. Directions how to use on the bottle.
Hope you'll set up your tank for your new little friends, but please follow the advice already given by Mindemae.
Also read as much as you can about Goldfish, go through the many posts on here too.
We are setting up a new tank for our goldies and it is so much fun: planning, restoring, buying the stuff, etc.
And we are talking tou our 2 babies, telling them what we are doing, they could choose their background poster, LOL.
As it is double sided, I turned it arround and asked" Which one do you want?" And I put the side up where they wiggled more...lol
(sorry, this is abit "off topic" but I think It is a good thing to cheer up)