Poor Service

I bought a car and received delivery on the 26 March 2020. I have a contract from the dealership that states the 1st repayment starts on the 25 May 2020 but the Standard Bank app reflects 25 April 2020. I called the call centre and the consultant promised to look into this and call me back but she has not called me back the same day and it's been more than 48 hours with no callback. This is very poor customer care service and the communication is very bad