The most secure type of safes are the type which are fitted into the concrete floor, and the door lies flush with the floor level. As they are set into the reinforced concrete, they are virtually impossible to remove in the short time that the thieving sons o' bitches wish to be in your property. These are quite easy to 'retro-fit' into your home, and can be built into the floor under your sofa, armchair etc. I should imagine that they must be available somewhere in Turkey.
If anyone does buy a safe in future, it may be a good idea to collect the safe in your own transport, rather than trust the supplier not to disclose the delivery adress to 'nefarious acquaintances!!!!
Very sad post, Rimms, hope all works out for the best for your friends.
Gordy.