Quick to Debit account but not reimburse

My husband and I joined Planet Fitness about a 18months ago. When we joined we were told we only have to pay one joining fee of R300. Which my husband paid in cash along with the two access disks. Yet at the end of the month when they deducted the monthly fee they deducted another R300. I have been sending emails as well as calling and i keep getting empty promises. I then told them i have recently moved and would like to move my membership to a club in my area. The cost to do this is R300. I then told them to use the R300 they over charged me to pay for the fee they charge for me to change between clubs. Yet still nothing, how long is this going to go on for?