Worst customer service and security

For over a year I have received the someone else's ABSA sms notifications. Despite numerous requests, ABSA has failed to remove my number from their system and continues to spam me (if anything they should be attentive, as this is a security hazard to their clients). When calling, you're on the line or being transferred numerous times, before someone answers and kills the call. Useless and a waste of airtime- just makes me more likely to not consider their services.