Annoyed customer

Plutinum Leisure called me last week on the 19th February to sell me a special offer that they have. They said they will send me an email with all the details but they didn't on the 22nd February I emailed them to cancel the offer. They requested my number to call me but they didn't. I followed up on that email today Elaine responded saying she wanted my number to see when did I take the offer, and she found that the offer was purchased on the 29th of January. I responded saying but your guys called me last for this offer, then she turned around and said it was a mistake but I should have cancelled within 7 days. I cancelled within 3 days, when you call them they say there's no manager on sight but this Elain respond to email without facts. Today is the 6th day and I cancelledf on the 3rd day. They are lies and they cheat customers. There reason I cancelled was because of hidden cost.