Not getting Premier speed.

Sometimes in 2013, my modem was updated and I was unable to get premier speed until someone from this forum (KipK) checked and stated there was a configuration change that needed to be made. He or she made the change and I immediately saw an improvement in my speed. 

I am in the same problem again. My modem has been charged again and still not getting the bandwidth I am paying for. Could a service tech on the forum please help me again? Thank you.