Diamomd bank new name
You're referring to Diamond Bank, a Nigerian bank that was acquired by Access Bank in 2018. As a result, Diamond Bank's brand and operations were integrated into Access Bank.
In 2020, Access Bank announced that it would be rebranding its operations in Nigeria, including the former Diamond Bank branches. The rebranding exercise was completed in 2021, and the former Diamond Bank branches were rebranded as Access Bank.
So, to answer your question, there is no longer a separate entity called Diamond Bank, and the former Diamond Bank branches are now part of Access Bank.