OUR LINE IS BEING TAKEN HOSTAGE BY SUPERSONIC - WORST CUSTOMER SERVICE EVER!

A fiber connection was installed at our premises after we contacted a local ISP provider. After a lot of confusion a router has been installed by Supersonic, but we never signed an agreement or signed up for a package. After reading a lot of reviews online, we decided to NOT make use of Supersonic's router and wanted our local ISP to connect our line and discovered that is was taken hostage by Supersonic and it can not be connected to our local ISP before the line is cancelled at Supersonic. Al we want now is the router to be taken out and the connection cancelled. We send a cancellation e-mail after many calls to the customer services - which is quite pathetic - and only received an auto reply e-mail and after a week nothing happened yet. So no contract or any deal with them or any internet connection, nobody to help us to disconnect the service and pick up the router.