Invast cTrader slippage?

I had a stop buy pending on GBPAUD Friday. I knew it was NFP, so I stayed away from USD pairs. I checked a couple of hours before market close to see what was happening.

The top of the candle when NFP was released is 1.99942. Looking at the chart, it appears the spread at this time must have ballooned out to at least 288.8 pips on GBPAUD, because apparently my order was filled at 2.02830.
I've experienced "slippage" before, but this even entered me past where I had my take profit. And it seems when you incur so much slippage that you enter a trade past your Take Profit - it somehow magically cancels your stop loss for some unknown reason- I suppose if it didn't I would have been topped in and stoped out at the same time as ballooning spread encompassed > entire ADRs.

My Buy Stop was at 2.00386 - so that was 244.4 pips slippage.

Did you complain your broker?

Looking at the Depth of Market at the time of execution, there were two offers better than the one I got.

I haven't complained yet, I might complain about not getting best available price.
It was a micro lot, so not a huge loss luckily - but I think I'll suggest a "Fill or Kill" order - meaning only to be executed if "X amount" pips slippage or less - otherwise cancel the order.
-And definitely not if beyond specified Take Profit level - which should just be common sense imho.

I might consider trading with them again if they did offer a "Fill or Kill" pending order option.