I had to reread your post twice, I couldn't believe what I was reading. You were told "FUCHSIAS WERE POND PLANTS" are you sure the plants are Fuchsias? Fuchsias are not pond plants, Fuchsias don't like wet feet, more Fuchsias are killed by over watering then anything else.
Unfortunately by now your plants have probably bit the bullet. My guess if you take them out of their pots you will see if there are any roots at all they will be nothing more than brown mush. If any of the top growth is still viable you might be able to take some cuttings.
If I were you, I'd take your Fuchsias back to where you bought them, ask for replacements because of the wrong growing instructions you were given, or get a refund. Hope you still have your receipt. Unfortunately you were dealing with someone who knows absolutely nothing about Fuchsias. Good Luck.

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