Pathetic bank that don't even know what is wrong on my account

For about a month now I've been getting an sms that I need to update my personal details or my account will be locked. But no phone number, nothing, not what I need to update nothing. Last week I phoned the bank and asked what do I need to update, and they could not say or see anything. Now Im getting the message again. Spoke to digital and they also can't say why im getting this!. There's no link so I know it's not spam. But no one can see what the issue is. So Standard Bank, if you lock my account, trust me, I will sue you