Fnb is a ****😡😡😡😡😡

Hello, my name is Tholakele and I have been a loyal customer to FNB for so many years, I took a life cover with them that cost me R265 last year in September and I have been paying my policy well, in September this year when I went to my FNB to check my things I found that my premium has now increased to R706 and I never received any communication from them explaining why the premium has increased that much, so they debited that R706 in September and again in October, towards the end of October I called them to ask why is my premium so much no one has answers for instead I'm being transferred from one person to the other, I called them again yesterday and they did say that on their system it shows that I am paying my normal fee and not the one that is being debited so I want to know where is my money taken to, I never accepted any Debi mandate from them but that R706 is sitting on my Debi mandates, I am so frustrated because they making me a fool, I want my money back as soon as possible or they will lose me as their client 😡😡😡😡