Harresment,disclaimer of personal information

I would hereby like to lodge a formal complaint with Lewis stores staff at East london branch. Since the day I open the account they have been nothing but trouble and **********. I open up an account in December 2019. The moment they saw how much I qualified for the did not think twice and pushed for the deal. The manager promised me the world and Confirmed the 1st installment will start in Jan 2020. Come the 1st week In Ja. 2020 I started getting calls that my account is in arreas. To my surprise Immediately panicked and could not understand how Since I was told I will only start paying Jan. We went back and forth and things never got rectified. Long story short covid came I got retrenchment . When I submitted my documents I only then learned my insurance does not cover the full balance. Back to the branch as I was told should something happen to my job it will be covered yet again I was done in and promised the world. For a year the insurance paid and when it was done the account was handed back to me. So my circumstances has change I don't even earn half what I use to .I continue paying 1500 which is not my full installment they excepted it .a full year down the line after paying every second day the phone my mother which is just my 3rd party harresting her tor paying.they come to my work place to humiliate me.now my question is where is the law on the consumer side.my personal Information is been given out, the staff at the branch is so rude .my account payments is not been update I urgent need help with this matter