A few months ago, I had a pair of earbuds I used to listen to music at work. I would also occasionally take them home with me to use, and after a few months they got lost at work. I'm sure I left them over the weekend on my desk at work, and they disappeared Monday morning, but since I used to take them home every now and then (and my bag had a hole in it), I wrote it off as a mistake on my behalf (they were a free pair of earbuds so no big loss).
I recently got another pair of earbuds, and had been using them for work. This time I never took them home, left them on my desk constantly, and again - they've gone missing (as well as the spare replacement 'buds' then came with it) off my desk, a few weeks ago. This time I know it's foul play, and I can't imagine it's anyone in my team (I've worked and known them for a year - although there's a possibility they might have picked them up, no-one in my team seems the sort to do something like that). And I'm sure it's the overnight cleaners as they move a lot of stuff on desks when they come in.
I've complained to the security staff but nothing has come of it. They seem to be dragging it out (almost three weeks and they haven't spoken to the manager of the cleaners yet, despite my pushing), and there's also no CCTV in my section of work to catch anyone for sure. I also can't imagine anyone (cleaner or otherwise) is going to come clean about it.
What can I do? It seems as though security doesn't care all that much, and they were a fairly nice set of earbuds that I paid for. Should I escalate this to HR? I'm not the only person who's had stuff go missing - personal glasses, and some other trinkets have gone missing - but is it enough to warrant escalating it and pushing for CCTV? Should I ask for compensation?