Over a year ago we had fiberoptics installed. Then a month later had phones routed through the same company. Initially, the systems were not operating correctly. We called them, they came out 3 times before finally resolving the issue of the internet working correctly. Now, I just received a bill. We paid all the installation charges, and each of the monthly bills. Can they legally send me a bill a year later for correcting a problem they created with improper installation?