Help needed quick please!

[EvesMama]

bought dd two gold fish(different breeds but same idea)saturday, had tank for 8 days before to get water ready for them etc...first fish lasted 2 days,s tarted sitting at bottom of tank and only moving occasionally then it was frantic flapping of fins..next morning found her floating at top
took her to pet shop with sample of tank water and they said amonia too high, buy a plant, dont feed other fish for 24 hours and theyll replace the fish at weekend to ensure water is ok by then.
get home put plant in other fish swimming about madly as normal..last night sat in corner at bottom of tank..similar to other one....still there..but what can i do????dont want both to 'float'..dd is v.upset

I was going to get a black moor but the petshop said they get stressed easily so I decided against it. I hope your fish does survive, its been through so much and you are trying your best to save it.

thanks kid
done 20% water change this morning, and carefully added, white spot, water conitioner and safe water to the 'new' water, then fed her one tiny small flake and she snapped it up
since yesterday she has been hiding in her fresh plant? asked pretty useless person when rang pet shop and they said she would be better when fresh water in and she was a little but also says white spot causes them to 'rub' against things, ie the leaves of the plant it think?..anyway, spots are fainter than yesterday, so fingers crossed.
wish theyd told me about black moor's causing high ammonia levels tho