Get a named contact in each of the crucial areas – as per get ready to hassle.
Ask how long each stage should take. Put this in your diary and call them towards the time (say a week or so) to see how it’s progressing.
If they’re inefficient it will basically serve as a reminder. If there’s a problem you should be able to help move it along sooner…
Sympathise with their pathetic excuses. Try to stay friendly. It won’t help you if you alienate them.
Get organised. Having a project book/diary or file from day one of your quest for a home will make a big difference to your effectiveness and nervous health.
Keep everything in one place. Even a cardboard box will do.