Overcharged and no response

I have lodged a complaint on 12 June to which there was a response from Planet Fitness on 18 June on Hello Peter. To date, I have still had no contact from Planet Fitness.<br> They sold my son a contract which he only took because he was promised that there was no joining fee. The R300 joining fee is now charged to his account. As a result of non payment of the joining fee, his membership is now frozen and he has received a bill for the June membership for R299 for which has had no use of the gym.<br> On calling the call centre, I am told that the Accounts department don't take calls. WOW! how on earth is one supposed to sort out their errors.<br> Maybe I should send them a lawyers letter, since they are quick to threaten clients with legal action.