UPC and Naxoo - "Connection fees"

I have been using UPC for a long time. I pay CHF35 per month for 600 Mbit/s.

Yesterday, I received a letter from Naxoo. I never knew I was using Naxoo in any way. But apparently, there is a “connection fee” for the fibre optics cable which was paid by my regie.

The letter from Naxoo also says that my regie will stop paying for the connection fee. So I have to sign a new contract with Naxoo and pay CHF29.95 per month otherwise my internet connection with UPC will be interrupted!

I tried calling both UPC and Naxoo but there were less than sympathetic and not helpful. I am still waiting for a response from my regie.

Has anyone here faced the same situation? How did you resolve this?