No Service from Fibrestream

I have been trying to cancel my contract due to no service with fibrestream since 11 December 2018. I have called numerously asked for forms. Finally got the cancellation form in February 2019 and sent to the accounts department immediately. Phoned to ask what the status is of my cancellation and I am not getting one response from them. I have asked to speak to someone in cancellations department and I am told, I am not allowed to speak to them as they are "outsourced" I have tried everything to get this account closed and no one at the company can give answers or come back to me. I have sent numerous mails and nothing not even one reply.