MWEB only interested in taking our money each month and not solving our connectivity issues

We get uncapped Fibre from MWEB. In theory it sounds great, every month MWEB take their money from us without fail! Of late one of our Android phones would display "Couldn’t authentic connection" or if we were REALLY FORTUNATE "Connected without internet". We thought it was a problem with the phone, spent hours at the Provider who couldn't find anything wrong, contacted MWEB.......nope not us!!! Then we even installed a NEW MWEB ROUTER and for a few hours we could connect.........oh.....not the phone we originally couldn't connect on........that phone still won't connect here but it will connect ANYWHERE else over wifi........that's 100% fact........A..N..Y..W..H..E..R..E!!! Now, today, Sunday 16 April.......all our devices display "Connected without internet". MWEB is our INTERNET PROVIDER so if it says"Connected without internet" and the problem just suddenly reared its UGLY presence and none of our devices are faulty, all of our devices have the latest software, all the settings are accurate then who is too blame people? I have had to call MWEB thrice in one week and after negotiating the arrogant attitude of the Agent MWEB still refuses to admit guilt, refuses to provide good customer service, refuses to get us and keep us connected. Poor, shoddy and non existent service from MWEB.