Bp south africa and avios travel rewards are thieves

Bunch of thieves i registered my avios card in may 2018 and i drive a truck so i fill 300 litres to a tank almost every day but when i log on to the website it says that my point ballance is 0 but accordind to my little loyalty swipe slips ive earned over 15000 points ive tried calling their hot line but they cant help me