Shaw Academy complaint: Unauthorised charges

On the 24th February 2021 I received an email from Shawn academy that said: SAVE MONEY WITH UNLIMITED!
Did you know that with Unlimited Access you’re actually saving money? You get 100% Cashback, learn a new skill or trade and boost your career! I then clicked a button that said GET UNLIMITED, so as I was curious I opened the email and I immediately got charged £69. I only found out because my credit card sent me a text message about the charges. Shawn Academy charged me £69 the moment I have clicked on an offer email. No CVV requests, no questions or preview ation of the membership required, before getting charged. I was not aware that by opening the email I would have got charged £69. NO information on the email states that I will get charged automatically just by opening the email.
I emailed Shawn academy straight away, which they got back to me today 27th February, saying that someone will give me a call back. This evening a representative of Shaw Academy called me saying they have now deleted my card details, which I entered when I registered for a free trial back in November 2020. I used their website for few day but then realised I didn’t like it so I never logged back in since the 24th February. The person on the phone said that I registered the card details in November so he y don’t have to ask permission to charge me. The moment I clucked on the email I was accepting the charges, and carried on explaining terms and conditions of the offer, and laying about the facts that the info where on the email, but they were not. He said the 100% cashback is actually an offer of over 90%off the value, it’s a great deal and that Refund is not an option. There was no way for him to give option of refund of any kind, even if i sent a complaint. He suggested and kept interrupting me, saying that he was trying to get things clear quickly, that there was no way whatsoever that I the company would ever give a refund back and that I should start using the Lifetime membership or give it to family or friends if I don’t want to use it.