I recently got new uPVC sash windows. After installation I realised that the frame is now much higher on the wall and there is no space above it to put a curtain rail. I know this can be normal, we have exactly this on other windows in the house and use a curtain pole where the central part is attached to the frame and the sides are attached to the wall. However due to a built-in in wardrobe on one side we have to use a rail (otherwise we wouldn't be able to open one of the wardrobe doors fully). So now I can't easily hang the curtains myself but will have to get in a specialist and most likely will end up with a bit of a sub-optimal outcome.
My problem is that the company did not tell me that the frame size would change. If I had known I would have asked for alternatives or, if they couldn't accommodate this, I would have gone a different route like refurbishing the original windows. They have been round and told me they can't see an issue and I don't know whether I should keep trying to get them to do something or just give up. I paid thousands of pounds for the windows and now will have to pay hundreds more to end up with a bit of a botched outcome. Should they at least compensate me for the specialist curtain hanging which I now require?