Sorry to hear of the damage & hassle.
Here is the bike I used in London for commuting, shopping & seeing friends, events etc... I thankfully had no problems at all,
even with the one (& only!) time I forgot to lock it up.

Abus Granite D locks have been good for us.
It's a Trekking bike: a peculiar niche of European bike - half MTB, half upright roadster & dynamo lighting. What helps is it's hideously ugly in any case, and extra hi viz highlights & tape that inevitably become scruffy don't hurt either.
They are deeply unfashionable yet versatile - I use it for pretty much any cycling, including touring, off road, and faster training rides to push fitness. I should say that it's been brilliantly reliable and tough.
Maybe I was lucky, but I reckon this kind of bike is a option for someone in London: that ugly confused mix of what it is & unpopularity in the UK, meant the public & thieves left mine alone.
Don't get discouraged & hope you get a good result!
