turn on your phone la dei ...

salah user

I also often have this problem with CIMB.

Complain to bank first and get them to verify, they have the logs and details to properly confirm if it is your problem or not.

In the meanwhile, do check your own phone especially the ol' default message app instead of whatever message add-on app (e.g. Facebook Messenger) that you are using. I realised that it always delayed my alerts and removed it from default settings.

Usually telco issue.

Anyway fitnah and drama with banks first.

Then go like. Ok fixed. Bye.