Almost a month, still no internet.

We app**** for Fibre with Mweb, and they came to install on the 14th of May. They then left again because someone hadn't done something properly and told us they would come back. They then came back and told us everything was now fine. My husband then called Mweb to get it set up and they said it takes a few days to activate. We waited a few days and still nothing. He called again. They said someone would call back. He has now called probably 8 or 9 times and it is the 7th of June but still we have no fibre and still nobody calls us back to resolve the issue. We do get messages to say our account is overdue though. Apparently they want us to pay for something that has never worked since it was installed. Can someone please get this sorted now?