Poor Service and Negligence.

Poor Service Delivery deliver from Nedbank which is one of the leading and biggest South African Banks has left me so disappointed as their client. I joined Nedbank in 2024 and took out a policy with them trusting they are the correct bank to give me good financial administration and also cater for my financial needs but I am left unsatisfied and very disappointed after a nedbank consultant Amy Pretorius called me and promoted a feature that if I switch my salary to nedbank from my current date I will receive 1000 cash back after 3 consecutive payments. I switched my salary in April and its now August and nothing has been communicated and no cashback has been received. I spoke to Sibongile Khumalo recently who advised that she has escalated the matter to the debit order department and have not yet gotten back to me with any progress or turn around of the query till today after she has promised to give me a call. Is this a **** ? who's responsible for this at such a big and trusted company like Nedbank?