D365 Finance min users (monthly)

Dear community

once again a real pain with NCE… our customer has seasonal increases in workers (oct-dec). This varies from 5-30. now when trying to add monthly finance or scm users (new subscriptions), the minumin is 20. this is so ridiculous since they already have 100+ on yearly or even triennial basis. We try to escalate it to Microsoft Switzerland, since the customer dpes not want to accept this (what I understand). Microsoft Switzerland does not believe this is a general problem 

could you guys please support me and write your frustration again? 🤓

thanks in advance

Daniel