FNB refuses to reverse a wrong/duplicate debit on my card by Bluu Car Rental

I requested FNB to reverse a duplicate debit by Bluu Car Rental (13 June 2022). Instead they wanted be to follow up with the car rental service. I followed up with the car rental (Bluu Car Rental) who claimed they had spoken to FNB to clarify the mistake from their side and were told by FNB to relay the message that I have to follow up with FNB directly. Which I did by re-sending the Debit Dispute Form along with the invoice from Bluu Car Rental. Instead of reversing the funds, FNB blocked my card. I had to go into the bank to have the card activated. They are toying with me, no one wants to take responsibility and just reverse the funds. I have sent several Debit Dispute Forms including email correspondence from Bluu Car Rental. However, FNB has not reversed the funds, as of 5th July (today), FNB can pick up the two transactions but refuse to reverse the second incorrect debit (does not correspond with the invoice).