So, I just recieved a mesage from a buyer who has said this: 

"This has not been delivered correctly to me .Evri picture is fuzzy , it was left inside the ground floor .My address is on the 3rd floor , I was in all day .Extremely disappointed you use EvriThis was a present for my grandson "

So they are saying it's inside the same building (I've checked the address and it's a small 3 story block of flats) and I'm not even sure if the delivery people can get up beyond the ground floor in this block of flats. Also the address printed is the same as the one given through eBays order page. No case has been opened. No negitive feedback recieved. 

So, how should I approach this?