21k km is some decent distance travelled already...so not that bad for your investment of nearly 1.5 years on this set of wheels.
As to why only right front, and your doubts on the tire shop's suspect on alignment, best is do what Kenntona says and get it verified by an alignment shop. $60-$80 bucks to verify the problem is affordable. Else you will never know who is right and who is wrong.
With the alignment report you can go back to tire shop to make claims it they are in specs and you confirm the offsets are wrong.
Can't you get the tire shop to remove the wheels to verify the offsets (they should be marked on your rims although i have no experience with Breyton rims) first?
Maybe only your right rim offset is wrong.
Could you post a pic of the hole and your tire wear?
Did you experience rubbing noise when turning right or left or when driving straight? I will be surprised if you have never heard any rubbing noises if you can rub through a hole on your car......
Wait....this is major OT to the original thread isn't it.....sorry