Slow and incorrect. Bureaucratically they seem to ...

Slow and incorrect. Bureaucratically they seem to have literally remained in the pre-internet era (with consequent timing). They issue invoices either based on "real readings" that are not real, or on supposedly enormously inflated readings. When reporting these inefficiencies to the customer number, the operators are rude and hasty, and the procedure required to rectify them is grotesque. I strongly advise against it.