S.O.S HELP available margin, or Equity trading

[cchrisking]

hi everybody i hope you all are going well, i'm not trader i just use to buy hold and sell when i feel i have profit of 30€ or less, anayway i was doing that on kraken but their platform is real shit so many problem, so i was looking for another platform i wanted to go for Gdax or Bitfinex but i finally dicided to go on another platform with the higher price but i want to trade BTC/EURO AND then EUR/ETH, when i sold my bitcoin i wanted to buy ETH with euro but i noticed  EUR/ETH was really not active on the platform but i submited my order by limit price of 540€ = 1 ETH i wanted to buy 1.30694 ETH for 705.75 EURO it stayed there live and then i saw i my my account i had 0.7ETH and €327.75 EURO in FIAT so i thought someone sold just 0.7ETH for me and i could buy again using my 327.75, but when i tried to submit order i received error message like i don't have enought money in my acount so i checked my account i saw i had:
P&L=0
and Equity=
€327.75
and
 Available Margin=
 €327.75,
i don't understand what is Equity is or available Margin ?
in my orders list i have like on the pictures below: so if i cancel will i have 0.7 eth in my account ? and the 327.75 EUR in FIAT ? or if i cancel will i have just my initial 705.75 back no ETH ? or just 0.7 ETH and not fiat ?
screenshot below
https://i.imgur.com/z1tvn5x.png

[cchrisking]

please somebody help me !!!!

[DaMut]

ok before solving this problem we should make it clear,
based on your screenshot you're going to buy 1,3 ETH and you're buying it at 540€,
everything is correct until now,right ?
but when you're putting that orders but it's filled only around 0,7 ETH,
logically you have something else behind right ? but when you're puting another order you can not do that ?
that is your problem right ?
they said you do not have enough money or something like that.
it can be happened that way because you have a LIVE order.
just look at your screenshot,you can find it in the right side and using a Blue Colour.
all that you need to do is click 'Cancel' Button beside 'LIVE' status and make another order.
i hope it can help you,thanks