Poor customer service offered by melusi

I called the vehicle department on a Saturday to ask for a quotation when I increase my vehicle car instalment, I wanted to know how many months I’ll be left with on the two options I gave him. He promised to called me back the same day with the figures, nothing, I’ve been calling Standard Bank from Saturday, Monday and today Tuesday and no one is assisting me but instead they are telling me that melusi will contact me back and his not calling. Can melusi do the job he was hired to do, I want to increase my instalment with my money, I don’t understand why he doesn’t want to assist me with that