Unknown transaction

I went shopping with my sister on Saturday 10th February 2024. We went into a few shops where I used my credit card to pay. I only used my Investec debit card at Woolies but to my surprise there was an additional transaction of R300 that went through my debit card. When I saw this unusual transaction on Sunday I called the investec call centre and spoke to a lady named Lisa and requested details as to what yur transaction related to as I did not make any purchase. She forwarded my request to the ***** department and told me they will give me feedback in 48 hours. Yesterday, after the 48 hrs has lapsed I called again and spoke to this rude guy called Muntu who was now telling me I must call Ikhokha as the ***** department is unable to get me any further details and he'll send me confirmation of payment. To say he was useless is an understatement. I called Ikhokha who told me they are unable to assist as I don't have any details and due to the PoPI act they won't be able to give me the merchant name. They only details I had is the date, value, transaction description as well as authorization code. Spoke to a guy named Junior around midday who said he was going to investigate, try getting in touch with Ikhokha and get back to me and I'm still waiting