An elderly woman account hacked

I am a pensioner, I was offered an account at makro through RCS in 2019 August and last year during lockdown my phone was hacked and after it was fixed it was when i recieved a call from RCS that my account has been hacked and my makro account was used via online shopping..they asked me to send my personal information so they can look into the matter i did but nothing was done till today, yesterday i decided to make a follow up to my suprise nothing is done and they still using my account, i've spent more than an hour trying to get this resolved but nothing was done and what makes me angry is that they expect me to be paying my account every month. This is poor service especially that am even a pensioner