Complaint about double debit orders, lack of transparency and misinformation.

I signed a contract with Planet Fitness Mall@R55 during this year, and I need to vent. When signing the contract, I was informed that I can enroll my son for free but have to pay a tag fee, which I did. Later this year in September my membership fee was increased by R100. I later contacted Planet Fitness to enquire and I was told that due to my son's membership fee. In addition, I was informed that the free membership for him was for only three months. My complaint is that I was not informed of the three months issue but as I signed the contract I had to let it go. Now in December I established that planet fitness has debited my account twice and I enquired. I called Planet Fitness today to enquire about this as it was not communicated to me when I signed up. I honestly want to take this up further as there was no transparency when I enrolled for this.