Telekom: Issue resolved

My issue with Telekom regarding the upgrade of my DSL connection was resolved to my fullest satisfaction. The story unfolded like this:
dsl-upgrade-disappointed-by-telekom
instant-science-dsl-upgrade.html
About two weeks after the letter from Telekom's Board of Management support, I received a call, telling me that they had taken the following measures:

For the router invoice, a credit voucher had been issued.

The law firm had been contacted to withdraw their claim

When returning home from my business trip later that week, I indeed had a credit voucher and a letter from the law form in my mail box. So, nothing more to say from my side.