Step-by-step list of what to do:
1. Check the speeds you are currently supposed to be getting from your ISP, what are you paying for
2. Run a speed test to see if you are achieving these speeds, if not go to step three, if so go to step 6
3. Disconnect all other devices connected and re-try the speedtest, if still below your amount continue
4. Contact ISP and ask if they are having issues and/or if they can help, if not continue to step 5
5. Change your ISP
6. Get a better package