Isoplexis help please

Hi all
I was given a pretty good sized Isoplexis canarienses plant last autumn, measuring about 2 ft and in a good sized pot.

Went on holidays and forgot to move it indoors so it caught the frost/snow down here in the south.....duh!
It looks very sad, but I dont believe it is totally beyond help.....do you think I should cut it back to promote new growth or leave it as it is for now and wait and see?

I must say I am pretty gutted as I had just the spot for it in the garden...........

 

I've only tried Isoplexis once, not sure which species it was now, but it wasn't hardy and died its first winter out.

Think I would just leave it for now and see what happens if the weather should ever warm up.