Mistake made with membership cancellation

<p>I payed my membership cancellation fee at Montana Planet fitness and sent in my signed cancellation form. End of story. Three years later, 2017, I get harassed by Saya debt collectors to pay my outstanding monthly premiums of R 16500 which is totaly bizare. Obviously a mistake has been made from their side. I have sent through my proof of cancellation and Saya still keeps badgering me.</p>