Advice for how to cancel?

February 26, 2024 - Went in person and cancelled my membership for the following month

March 1, 2024 - I was billed $49.00

March 18, 2024 - I was billed the monthly fee even though I cancelled in February.

March 19, 2024 - I went in person and spoke with the manager who assured that he was processing a refund that would arrive within 7 business days. He also cancelled the account again since he said when I came in on February 26 it has not been cancelled.

April 1, 2024 - I check and my account has still not been cancelled and I have still not been refunded by PF. I will now be charged for the month of April.