Thank you for your interest in Helix services ! With a new commitment, you get a discount for 24 months. Indeed, the basic prices of the services may change during the year.
Here are the details : At any time, we may amend your contract, including the price and the nature of the service offered. We must inform you of any amendment at least 30 days (or 60 days in certain circumstances) before its effective date, by a letter or writing that deals only with this subject.