Poor fibre internet speed

Good Day. I live in Secunda, Mpumalanga. I pay each month for a 10mb/s Fibre connection. My internet speed is pathetically slow all the time. When I phone the Vodacom Fibre customer support, the only thing they instruct me to do is to switch off the router for a few minutes, then switch it back on. I may not be a specialist in your field, but I'm also no idiot. This is not solving the internet connection speed issue. I've ran various internet speed test on numerous occasions. My internet speed peaks at 1.8mb/s and average 1.4mb/s. Really??? Is that what I'm paying for? Can someone at Vodacom please start taking accountability for their poor service delivery and send someone out to attend to this problem. When your customers pay for a service, then we expect you to honor that agreement.