Comwave I paid 126 dollars in April 2018, now they want another 166 dollars for what? Toronto Ontario

When I first signed up, I signed up to the add that says Comwave Bundle, Internet, one free home phone line and unlimited Internet. The add is on the web sight. 

The deal was to good to pass up, I cancelled my services with rogers. I was Rogers customer since 1995, I signed up with comwave.

if you calculate 89/95 plus taxes comes to 109 dollars and some cents.

As I was going through my account there was an add if we wanted a Enhanced second line for 7 dollars and sone cents. I asked custome service how much would it cost and she calculated about 112 dollars and some cents.

I signed up to the offer, which is no longer advertised.

Now comwave wants 166 dollars for what and how did they come up with the amount? which I refuse to pay.

The time I signed up, I had given Comwave my Capital credit card number.

Three hundred dollars was already been taken off my credit card and I had to cancel my card.

Comwave has no means to any of my finances for them to with draw the amont of 166

I need help in solving this problem with Comwave.

I don't mind cancelling my acount and breaking my contract of 3yrs with comwave.

Kind Regards