Faulty timing chain

[Gazph1]

Have checked dvla site for the new recall,and my vehicle is on it, unfortunately I think my timing chain has snapped, just had AA out and they suspect the chain. Got in touch with bmw uk and not had a reply to two e mails I sent them.
My vehicle is a 2008 1 series 1.8diesel, bet they won’t do my timing chain, even though it has the faulty parts fitted from new.
Anyone else had any joy with bmw uk.