Claim time

On 14/02/18 i was a victim of smash and grab. My driver side window was smashed and my chain ********** my neck. I went to the nearest Police Station to make a case. The following day i phoned Budget and explained my story, fine, i then went to Glass fit to get my window repaired(thank you for that) and said that someone will be in touch regarding the chain claim. Now i know recently i just had a bad luck phase where everything goes wrong and i had 2 or 3 claims within a short period. Now i have been a client for long and haven't claimed but now when i'm going through this unlucky streak it seems that Budget isn't playing fair. With the recent car hi-jackings etc(as the Polo and Golfs is in demand in the PE area), i specified a couple of stuff, aswell as my wedding ring and chain. Now the chain my husband bought as a gift and he is useless with keeping any kind of slips. When the person phoned me the following day she said i must either provide a slip or valuation certificate, i have 14 days to do so, if not the entree level amount would be paid out. My husband searched for the slip, as he bought this cash, and he also had a valuation certificate but also could not find it. I unfortunately failed to make the 14 day deadline and they phoned me to tell me my claim has been rejected. I mean, why would i insure something and when it comes to claim time, its always alot of stories. It was exactly for times like these, the smash and grab situation, that i specified certain items. I just think it is unfair to just reject the claim.