Bad and umprofessional service

Hi there

I have never dealt woth in professionalism at this degree... In February 2018 my Statement said i owed a cwrtain amount on my Fnb Cheque, I pay every month, the last 3 months i have emails, Karabo, Megan and Theunis jnr and NO ONE has responded. I sent a whatsapp to Hammond poles number now and received an amount of R2000 more then in February 2018 yet i pay every month and more then what they required.. How can an amount increase in 6 months by R2000 if its paid and why not send me a statemnt to show where amounts are calculated from?

This is seriously yhe worst service ever wish FNB chose better oi.