Vodacom Fibre Bad Service

We have been strugling, since April, for help, assistance, resolutions and dedication from Vodacom Fibre! We have been calling the technical every single day. Every there is another story! Between 11pm until 9am there is no connectivity and the wi-fi is being throttled during the day. Connectivity is only 2.3Mb instead of 10Mb. A technician was sent out on 13th of May, his so called resolution was that the rooter was full of dust and that it had to be cleaned, (the ports on the inside) regularly. Anybody with a brain can accept that this sound rediculous. We are very upset and after a promise that the supervisor, Donald, would call back.......still no respons.