Payment delays

Since last year October I have been having issues with my account when making payments to other banks. I have had 2 or more payments that took more than a week to reflect in the account of the other person. I have had issues with immediate payments. I have reported this numerous times but still no help from Standard Bank. I have been on the phone, in the branch and not sure what more there is to do. I bank with SB as I get staff rates and wish to stay here, but this inconvenience is slowly making me rethink if the benefits is really worth it.