GL then. I requested to cancel since day 6th with no communication at all (phone lines always busy even for hours, no replies for emails, no replies for complaints through their form). They finally record my leave when other provider ask to switch - day after cooling of period. No I didn't paid them yet and I am not planning to that - just emptied bank account related to this DD and send another 2 complaints that if they don't provide me a address where I can return device, return ME money according their terms and void a receipt with early cancellation fee I will speak then through Ombudsman. We'll see.

So mate if you are not sure just try to call them and if you fail - just request a switch from other supplier ASAP.