We rented our property out

We rented our property out with Belvoir. They took a 2 month deposit (£1150), which they were registering with the TDS, from our tenant and moved him in for us in 2007. When the tenancy ended in February 2014, we, with the tenant went to Belvoir for the deposit back, which they refused to pay. They had no trace of it. Apparently we were not actually dealing with Belvoir Lettings (even though that is what the tenancy agreement says) we were dealing with some dodgy franchisee 'trading as' Belvoir. Dodgy franchisee has now left the country taking all the deposits with him. Firstly Belvoir did not hold any records of who had been affected and secondly they are now accepting no responsibility whatsoever. LANDLORDS BEWARE!! You are not dealing with the big company you think is Belvoir, you are just dealing with any old individual!!!???!!!