Cable Internet connectivity Problem?

Cable Internet connectivity Problem?

I just got Internet cable from Time Warner/ EarthLink. For some reason I tried everything that Time Warner and Earthlink techs told me to do but nothing seems to work. I still can't connect to the Internet. For some reason they think it's the IPv4 address since it begins with 169. I did everything the told me to 8 times, but they both give me the run around tell me it's the other's fault. How can I fix this once and for all?