eHarmony complaint: Deceptive marketing; not stating charges applied when you cancel within 14 days

I signed up to a 3 month subscription of e harmony due to a 50% discount email I received. Very quickly, within 48 hours, it became apparent that their matching system is appalling, suggesting people from miles away and completely inappropriate to the answers I had given on signing up. I cancelled my subscription and emailed them within 2 days of signing up and they are now asking me for a payment of £65 which is apparently a reasonable cost for 2 day
usage which they justify by saying it’s only half of what the personality profile costs for them to compile. In their terms and conditions it states that a FULL refund is available if you cancel within 14 days and that if you have started to use their services which of course you have to in order to decide if it’s right for you!!!!, then they have the right to charge a ‘reasonable amount’of value compensation. Nowhere is this £65 stated. They deceive you into signing up on a discounted rate then send robitic replies to my several email comaints totally ignoring the point I have made. Deceptive and dishonest company who are only interested in your money and who practise false advertising to lure customers in. They then threaten debt collection which, along with their useless emails, amounts to harrassment.