I bought an 18 month old Peugeot 207 in August 2009 from a main Peugeot dealer. With it I bought a set of roof bars, which were fitted to the car when I bought it.

I had removed and replaced them several times, but when I went to take them off last November(2010) the front one wouldn't release on one side.

Since then I have been back to the dealer four times, on two occasions they have claimed to have fixed it but when I went to remove the bars they still wouldn't release, in fact the back bar now won't release either - plastic pegs which should operate the release mechanism seem to have sheared off.

The mechanism appears to be virtually all plastic, so it's not a case of corrosion, and of course the bars are out of their 12 month warranty.

I am pressing for the dealer to remove and replace them as not being of satisfactory quality, but they are dragging their heels and generally fobbing me off, and all the while I am using extra fuel because I have roof bars stuck to the roof.

I would expect roof bars to last more than the 14 months that they did without developing a fault - I would be grateful for your opinion on what to do next.