Hello,
I placed an order for Internet for my flat on 16.02.2021 and a technician is supposed to come tomorrow for doing the setup. However, last night on Check24 I have seen the same service I ordered but it's much cheaper (because of check24 Cashback and Gutschein).

If I cancel my Telekom contract today and order it via Check24 again for the cheaper price, do I have to pay anything to Telekom for the cancelation (also because it's so close to the technician's appointment)? Or is it possible to change my current Telekom contract and get the discounted price?
Thank you!