Billed for services unknown

Debited an amount of R8. 60 with Ref POS Checke ***5 INS Funds I've never had any insufficient funds, furthermore, all my debits only goes out on the 1st of every month. What was this debit for. Refund my R8. 60 debited 23rd February 2021, failure to do this, I will escalate this matter to Dion Michael Brown, the CEO