Poor service. High **** alert

I signed up with Supersonic, debit orders were paid on time however for 2 months I had no internet. I escalated it, call client care numerous times and the one agent dropped call in my ear. Called again and got a different excuse for why it's not working. Reached out via social media (Twitter and Instagram) send emails however never got assistance. I canceled my contract however, they still sending bill invoices. I'm extremely unhappy with this company as they operate like a ****ming company.