Business ProfileforWalkers Marine

I brought my boat to Walkers Marine for repair. The major repair was to the center outboard engine (Mercury Verado 300 HP). The shift actuator had to be replaced. On December 28, 2022 I received an invoice in the amount of ******** for the repairs unrelated to the shift actuator. I paid this invoice by credit card. The replacement of the shift actuator is under warranty with Mercury Marine. On February 20, 2023 I received an invoice for $4,016.83 for the cost of the warranty work to replace the shift actuator. Without gaining my authorization, Walker Marine charged the credit card that I used in December for the $4,016.83 for the cost of the warranty work.I have spoke to Mercury Marine, and the shift actuator is under warranty. They indicated Walker Marine never filed a warranty claim as they should have to receive payment.I have spoke multiple times to ***************** in Walker Marine's service department and to *****, the general manager. My last conversation with ***** was on March 22, 2023. He indicated the charge to my credit card was in error, he apologized and indicated a credit to my credit card would be processed within the next day or two. As or today, April 6, 2023 there is no credit from Walkers Marine on my credit card.Walker Marine has my money, money I do not owe them, and did not authorized them to charge my credit card. I would like the help of the Better Business Bureau to resolve this issue.