Seized locking nut

[pvr]

In February (20th), I changed my summer wheels for winter wheels due to expected snow. Torqued the wheels up to the usual 140 Nm.

Had the car serviced on the 22, which was a full inspection and brake fluid changed.

On April 15th, I tried to remove the wheels to swap the winters for the summers and from one of the wheels, the locking bolt was so tight I could not remove it. All bolts were tighter than I expected, and as I have been swapping wheels for the last 10 years + every year for summer and winter season, I "know" how tight they are when I remove them.

I assumed the dealer had overtightened the bolts during the service, so I just got them to deal with it.

First of all, they stated that they NEVER remove wheels for any service, only when replacing pads. And secondly, they tried to present me with a bill of £223 for the pleasure of removing the nut.

Two questions:

- Has anyone ever had a seized locking bolt after 8 weeks of having wheels on.
- Is it true that on a full inspection, the wheels are never removed.

As the bill for this was excessive, I want to see if I can "prove" that they should have removed the wheel as part of the service (i.e. if they have not, they did not follow the schedule and I have them on that point), or if they change their story that they do remove them - that they will have overtightened it.