This is probably really unhelpful, but simply said: no.
You will probably try a number of different approaches with TWC's "customer service" department in order to see if they can say anything remotely intelligent, or at least different from what the last person left you with in regards to excuses, and then maybe during your tenth or fifteenth attempt you will have a "technical engineer" pay visit to your house and do nothing but fiddle with the modem they gave you or criticize the one you decided to choose for yourself. Perhaps the issue will resolve itself "magically" at some point, but really, I would abandon any and all hope if you want this issue to be fixed in a timely manner by paid people actually working on it.