Not informed of my contract expiry date

I took out a 12 month contract with Planet Fitness, after 12 months my contract expired and it states on my contract I will be notified in writing when it expires but I never got anything or heard from Planet Fitness. I had to contact the the Roodepoort branch to find out when my contract expires, when I got through the branch I spoke to someone who told me my contract expires end of March and if I wanted to terminate it then I will need to go to the branch. Last week Friday I drove to the branch, spoke to Queen and I told her I need to terminate my contract when she check on her system she told me my contract expired in January this year, I asked her why am I still being billed she told me I was on a month to month contract and if I needed to cancel my contract I needed to contact customer service. I requested to speak to a manager, she said she was busy in a meeting and I must wait for her. Manager finally came however she was attending to a guy I was there before and when I looked at Queen, Queen told her my query she didn't even bother to help me nor say anything to me and Queen kept on referring me to customer service.