Unauthorized debit

I am so sick of this company! After I paid their cancellation fee, they debited a monthly subscription fee from my account. I asked for a refund on 1 April. Message from them on 12 April: Good day, we apologize for the inconvenience caused as we have over debited an amount of R180.29 We cannot process refunds at the moment, Kindly authorize us to utilize it for your next subscription. Please advise further. Thank you Message from them on 22 April: -Good day, please note refund has already been requested. Refund takes 7-14 working days. Last week on Wednesday:

A ticket for a refund has been logged already

This morning: The statement was reviewed, Our records indicate that the is no amount due for a refund at this time.

My statement clearly indicates a debit on 31 March.