Beware of this scam!!

Beware of this scam!!
Stay far far away from them. I booked a flight from Toronto to Mumbai. As per their website, it had a transit flight in Chicago. They never mentioned that I needed a transit visa for a having an international transit (as we don't need visa for transiting in other countries with exception of US). As soon as I booked the ticket, I noticed this visa requirement in their confirmation email and contacted them within 30 minutes of booking. They said they will charge me $600 (negotiating down from $750!) for cancellation as I don't have transit visa in US. They said they will deduct this charge ($600) for paying penalty to airlines, from ticket charge and refund remaining money. Now is the fun part- The air line, AIR CANADA refunded the full money to my credit card (charge and reversal from AIR CANADA) as it was cancellation within 24 hours. AFTER 2 days, these scammers charged my credit card with $600 (this time a charge from FLIGHT NETWORK). Their agents who run this scam is in India and talk to you rude and hang up on you after all this cheating.

Update: Currently I am proceeding with suing this scam Canadian company for full refund PLUS compensation for my lost time, stress and shock. In fact, they are a name sake Canadian company. They are actually run from India by a bunch of scammers with help/registration in Canada (these cheaters are disgrace to truthful Indians). Canadian consumers fell prey in their trap (traps on their website when booking, unauthorized charges etc) and deceitful business practices, can take legal action against them through Ministry of Government and Consumer Services (province of Ontario). In Ontario, consumers are protected under the Consumer Protection Act, 2002. Also file complaint with BBB. File complaint with airline as well. These are scammers and protect our fellow consumers from scammers like this one. I used to live in the US before moving to Canada, This type of scamming never happened to me with US companies there.