Car accident repair advice

Thats a new bumper job, not worth buying new for a car that sell well under a grand regularly.
Id try buy a used bumper on ebay in black and bolt it on, takes 10 minutes and im guessing a bumper for a spark will likely be around 50 quid if you're lucky (edited)

That rear bumpers already been repaired before and to a pretty poor standard unfortunately.
As above mentioned try finding a second hand one in the same colour, or just buy some bodge and black paint for a DIY

Like Mark has suggested. There are quite a few black Chevrolet Sparks being broke on Ebay. Just search "chevrolet spark breaking" and you'll get get quite a few results. Then message them and hopefully you'll get a replacement bumper for a reasonable price without having to have it painted etc..

As above, leave it or find a bumper in colour, there is one on EBay for 100 quid in colour but has scratches all over it and would need painting, you can get new ones for under 100 but will need painting, just keep your eye out, I believe they share the same bumper as a Daewoo Matiz

Whereabouts in the country are you?
That should cost £200 to repair.

Either do the above and get a used bumper or you could patch it yourself with some fiber glass, but don’t expect it to look new!!