On November 14th I go to engie for the supply of e...

On November 14th I go to engie for the supply of electricity and gas with the nest thermostat included, the girl with whom I entered into the contract guarantees that after about 15 days I would have been contacted by the technician for the installation of the thermostat, which is why I made the passage, after 3 weeks having not received any phone call I call the customer service who say "no, absolutely 2 months must pass", then even if I intend to cancel, but not to make a registered letter etc., I am waiting 2 months, today 26 January, still nothing ...