PYRTLE
Old Berkshire Boy

I would have opened up something like a small claims case against the parent company by now ; seeking damages / compensation for their unreasonable behaviour, delays and confusing excuses, stalling tactics etc. Given you have and can show the various correspondences to prove their poor attitude towards your initial request for repair, I doubt Leica would contest the hearing. May not be what you wish to do but they have messed you around whilst displaying a very poor level of customer service.
Here in the UK, this system doesn't cost a lot to commence and does regularly obtain favourable results for the claimant.
Here in the UK, this system doesn't cost a lot to commence and does regularly obtain favourable results for the claimant.