Unreasonable Terms

I have been with amobia the past 6 months and have received average service up unto this point which I was contempt with. Now I have given i notice at my flat to move out within the notice period (20 days) but when providing notice to Amobia I am informed that they require a calendar month notice which I missed meaning I will need to pay for Wifi at a location I will not be staying at. I have thus requested them to provide me with the service at my new place which has fibre seeing as I am paying them for that month and now they are not coming back to me. This is very shady practice from them and I am really not happy. I do not want to pay them for that month but their might be implications but I do not want to be bul**** into this situation. Is there anyone/ anyway I can get assistance.