Double Debit

I became a member of the gym in 2024 and have consistently paid my membership fees. In February 2026, I enrolled in Sanlam Reality to receive an 80% discount, as I had previously been on a 20% discount. My new Sanlam Reality membership commenced on the 1st of March, and around the 8th of March, I completed the necessary forms to adjust my debit order from the 25th to the 1st of each month, which was executed promptly. However, on the 26th of March, when I attempted to enter the gym, I was denied access and informed that I owed approximately R1200. I am uncertain about the origin of this debt, as I have never missed a payment. I submitted a query while at the gym, and a few days later, my access was restored. On the 1st of April, I was charged twice, with amounts of R749.25 and R499.50 debited from my account. I have always made my payments on time, and it seems unjust for me to be charged twice, especially since my debit order change was processed correctly. This situation is perplexing to me.