Useless info systems & rude staff @ mabopane branch

After opening a stokvel account with standard bank in 2018, we deposited some money into the account. Today we went to Mabopane branch to withdraw our money. We have since lost the account number in question and a consultant tells us, that without that acc number, we are not going to be helped. Even though we have all our id's used to open the account. We escalated the issue to the manager, some rude mpho maboela who told us we will have to wait for a few before they can retrieve our details. In this information age, one still has to wait for days for someone to run a datanase querry. How useless can standard bank be?