Fibre connection- watch for integrity -Line speed

When it comes to high speed fibre, although I accepted a telephonic offer from Telkom to upgrade my internet connection to 10 MBPS which I had to agree to a 24 month agreement with Telkom. My business line speed is slower than ADSL and when I check the line speed, this is consistently lower than 4 MBPS. I have reported this fault to Telkom, a technician came to my office and after all said and done, still cannot fix this problem, yet I still have to pay! Poor service Telkom!