Washer making noisy rattling sound on spin

I have just bought a new Bosch classic 1200 express. I have completed 3 washes, just returned from holiday and whilst the machine was in final spin I heard a noisy rattling sound, I switched the machine off and examined the inside, I thought at first that one of the kids had left a coin in the pocket of their trousers.

I found a metal bra bone, which is half circle shape. My wife examined the bras that were in the wash and found one with no bones at all we removed the loose bone and took the washing out which had almost finished anyway.

Today we carried out a full wash, when the program started the final spin,, at full speed, something started a rattling sound and I think that one of the bra bones may have managed to wriggle its way through the inner drum holes and into the space between the inner and outer drum. The machine has a 2 year parts and labour warranty. Is there anything I can do. I have had washing machines for 40 years and in that time washed hundreds of different clothes but never experienced anything like this. The occasional hair grip, coin, safety pin but I would never imagine in a thousand years that something in the shape of a bra bone (which are not supposed to come out) would find its way through the inner drum.

Any advice would be appreciated.

Thank you.