TORONTO - A class action lawsuit has been launched against Hydro One claiming customers were victims of a new billing system brought in by the utility.

The statement of claim, filed Wednesday in Ontario's Superior Court of Justice, alleges widespread billing problems after Hydro One introduced the new management system in May 2013.

None of the allegations have been proven in court.

Bill Bennett, a Gravenhurst, Ont., resident is the proposed plaintiff in the suit who allegedly experienced numerous billing issues including unexplained increases in cost.

The claim says Bennett, for example, received an envelope from Hydro One in April 2015 that contained nearly 40 revised bills for a four-year period that represented about a 185 per cent increase in the cost of his electricity bills.

Daffyd Roderick, the director of corporate affairs with Hydro One, says he cannot comment as the matter is before the courts. The suit is claiming damages for $125-million.