Unable to provide line speed. Unwilling to do correct refund

I joined Metrofibre on 1 Aug 2023. From day one I did not receive the 1gb download speed I paid for. After multiple visits from their technician and calls to and from their NOC department they were unable to find the problem. On 11 Aug I had enough and cancelled the service with immediate effect as they did not provide what I paid for. On 23 Aug 2023 I received a credit note for 7days and I paid for a full month of service. I will be escalating the matter. Anyone out there should think twice before joining this company.