Sales manager back dated my contract and says I can't cancel! Poor/no service from the customer center.

The sales manager in Rivonia back dated my contract/membership. As usual, they are pushy to get documents to secure a deal for you. So I sent my documents to him on the 26th of April and then signed my contract on the 2nd of May. 5 days later, after confirming that I will be relocating and there is no Planet Fitness in that area, I asked them to cancel my membership, and I believe I qualify for the 5-day free cancellation policy after signing the contract. Now because they are ***** and *******, the sales manager at the club who back dated my contract said I don't qualify for the free cancellation because I joined on the 26 of April, yet he signed my contract on the 2nd of May. Despite my attempts to send proof of my whatsapp chats and emails with him on the 2nd of May to the head office, asking me to come in and sign my contract, the head office/customer service has still not gotten back to me regarding this query. I emailed the club manager but he never responded nor gave me a call. The consultant at the customer service never responds to my emails either. Not to mention that they never answer calls. The service is so poor and disgusting to say the least. They are so quick to secure a membership for you, with their lies, but can't assist you when you want to terminate the membership. No I understand why they are cheaper than Virgin. They are just useless and pathetic! Sies