No internet access for almost a month now!

Our fibre internet (fibre provider is TT Connect) has been down since 12 September, nearly one month now. We have had numerous call outs with responses of 'this is another team's problem' and 'another team will call you back'. Days/weeks go by between calls and visits and actual promises by staff over the phone for someone to call back go broken. It's unacceptable customer service and more frustrating than anything else as there is no sense of urgency or responsibility. We have had enough now.