Why is my internet so slow?

My internet is absolute garbage, i dont know whats going on its really fustrating. The Mbps change by the second from 8 Mbps to 36 Mbps. Also the signal sometimes is at 2 bars and changes to 4 bars. I have a laptop but im not moving it around. Someitmes in the middle of an online game or video my internet connection gets cut for like 10 seconds and then comes back on. I hate this because my game needs to be reload along with my vids. I am with "the source". Is there something wrong that i am doing or is my interent just plain trash and im getting cheated from the company? please help.