It can't be returned for several reasons; it's partially built, the tank is part of the VE day set and it was bought quite a while ago. The only real option is getting a replacement part, or buying an entire new kit which doesn't solve the problem at all. Assuming they know their own prices, i don't know how they can justify charging £4 for a very small part of what is a £6 - 7 kit, around half the price of the complete kit for a single part of which were are supposed to be 22 of these in the box. If that £4 cost is just for postage, that's even more absurd. The item can easily be fit into a small envelope with a 2nd class stamp. And like it said, what makes it even worse is that looking around i've seen mentions of people being sent their replacement parts for free. Infact i even saw one that asked for an optional payment after the parts had been dispatched, although that was from a few years ago. They replied to me quickly which is nice, though.I'm not saying the service is completely terrible, it's good that they offer replacement parts in the first place, but i hope you can see why i'm not happy at all about this.