Virgin Active Contract entrapment

I phoned two months ago to cancel my wife’s membership and myself and was told they will give me two months at a reduced rate to see if I will be able to meet my vitality requirement. I agreed but still could not make the time to use my membership. I then phoned at the end of the two months to cancel as its not working out. Now I have to pay another month (August) Full premium because I did not give 22 days’ notice. I do not agree as I tried to cancel two months ago. This is not fair and I feel needs to be reversed. Call centre was not helpful at all and not empowered to assist and understand. I want my money back for August.