Standard continues to mess me around

I am now past frustrated with the service of standard bank. Although they have responded to my previous review that someone will assist me, no one has contacted me. I am now being hounded by collections, with a vehicle instalment amount having increased by more than R1000 for insurance, of which I have provided my insurance certificate whom iv been with for the past 3 years. Call centre agents cannot assist, I asked for a managers assistance, Verushka was too busy to take my call. I contacted the collections agency, who cant help me. How do you treat your clients like this? Pathetic service. Correct my account, or this will go further.