Jamo D7 volume control removal

Can anyone give me any advice?

Going to send my Jamo D7 sub off for repair, but the company only need the electronics from it. Everything else came out all ok, but the volume dial seems to be held in place by a circular plastic surround from the inside. I do not want to force anything and end up breaking it, so has anyone ever received it? If so, how?

Lastly, if anyone has by some very slim chance has one of these spare please let me know.