No Fibre connection - passing the blame

We had fibre installed on the 24th of October 2017. It took Mweb two days to connect our account to the fibre. We only had two days of fibre and then it went off. Since our ADSL line was still active Mweb issued us with a temporary account on the ADSL line while they fixed the fibre. The temporary account has now expired and still no fibre. Mweb won't provide us with another temporary account for the ADSL line and we now have no internet as the fibre is still off. Mweb keeps pushing the blame over to Vumatel who tested the Fibre and everything is working on their side. According to Vumatel the fault lies with Mweb but Mweb denies this. We have made various calls to Mweb's call center but still no Fibre. It seems that Mweb is unable to provide the Fibre service which they advertised and this is unacceptable.