We call the power company a couple of things. We have the DNOs or district network operators, who own and run the distribution network, transformers etc including the cable into each property and the main fuse(s) for that property.
We also have the energy supplier who own and maintain the meter for each property. That's who the householder pays their bills to.
The fuse and meter are sealed and we, as electricians, are not supposed to break these seals or tamper with this equipment.
Here is a map of the UK showing the DNO companies. The energy supplier is whoever the householder chooses.
Your network operator can tell you who your energy supplier is, if you're unsure or don't know.
www.energynetworks.org