Worst customer experience

I sent through an email to standard bank for a settlement on my vehicle on the 26 May 2022. I called their call centre on the 27 May 2022 and the agent assisted me with a credit that was supposed to have been credited to me and my account closed for the vehicle as per ref number ***. Yesterday on the 2 June 2022 I spoke to a lady by the name of Wendy and she promised me my credit could have reflected into my account till now the is nothing. I called the call centre using my own airtime but the consultants have been very rude and unwilling to assist. They've put me on hold twice today without being assisted. I have been a client with Std Bank for quite sometime and I must say the service I received is forcing me to close my account with the bank.