Useless customer service

I got an FNB account at the beginning of Dec 2020. I immediately got the app and started working towards ebucks. I tried to load my car under the car-nav section many times but that section of the app wouldn't work. In Dec I filled R2400 petrol at Engen garages. When I spoke to an FNB agent in January she reassured me that I would still earn the ebucks even though my car was not loaded. I went into the bank and the lady that assisted me said she would contact ebucks. She tried 3 times and eventually laid a complaint on my behalf. Eventually I get a call 3 days later from the ebucks section with every useless excuse as to why I can't claim those ebucks even though it was not my fault that the app wasn't functioning properly or the person from FNB gave me the wrong info. So I have lost ebucks from December for over R2000 fuel and I have started filling for January and still no one has contacted me to fix the app. So once again I am losing out. FNB is quite useless. Don't even bother trying to phone them while you hold the line forever.