Hello

I am hoping you can advise me on the following.
I recently paid 9k for a 2001 motorhome,when I went to buy the the road tax the police were called as the V5 was a forgery ,the police then came to my house and following vehicle checks it appears the vehicles identity had been changed and the original had been stolen,they then took it away for fingerprints etc.I had done all the usual checks an Experian autocheck with insurance upto 30k when you enter a vin number which I did I contacted them but they say under section 3 I cant claim on the insurance(rip off)
I assume it will be returned to the insurance company that would have paid the original owner when it was reported stolen.I watched a crime UK TV programme the other evening where a vehicles identity had been changed and originally stolen and then it was returned to the insurance company and the police officer said now the innocent purchaser will take the insurance company to court,but I didn't really understand which insurance company he meant is it mine who I insured the motorhome with remember I am insuring a vehicle that doesn't belong to me as the identity has been changed,or this it the insurance company who the vehicle will be returned to.Can you advise me of any other routes available to me.

thank you for your help