Please release funds on my cheque account for car rental

Dear fnb ..I rented a car at avis on 11/12/2020 and i returned avis car on 09/01/2020..and avis already gave me an invoice... Please release the funds on my cheque account as funds still pending on my cheque account.

Avis car rental said I must contact my bank to remove the hold of funds as they already gave me the invoice and charged me.