Planet Fitness. STAY AWAY! They are incapable of managing their accounts

A number of years ago I was a member at Planet Fitness. I canceled the contract duly. However Planet Fitness took it upon them to auto renew the contract. It took me in excess of a year for them to acknowledge they were in fact, in the wrong. Fast forward 5 years and I decide to give them a 2nd chance. Now they lost a R50 payment of mine that was paid by card in their Montana gym! I sent them WhatsApp proof of the payment and they expect me to go into the gym with bank statements. I have never encountered anything like this!