Poor service

I have provided my email as requested previously and still nothing. I need my account to be reset and if it can't be done I need the contract cancelled with immediate effect. I can't be paying for a service am not getting. My router hardly connects and for those minutes that am lucky enough to get connection,its extremely slow yet it shows coverage. I needed to login so I could cancel it myself but clearly that won't be happening at this rate. I repeat my registered email address is *** which I no longer have access to and my new email address is ***. I don't think it's that difficult for someone to reset my account?