Disappointed from MTN

Good Day I've opened an cellphone & WiFi router account contract with number 1 leading cellular network(MTN) on 2018 June, I was paying my accounts nicely without missing payment my premium is R507. On the 25/03/20 when national lockdown stated I contact customer service told them that my job it's been affected so I won't manage to pay my accounts so kindly arrange me payment break, the representative told me that my premium is "too little I can pay it otherwise your name will be ruined" and I told her I don't have any income because we're closed how must I pay it? They told me to make plan they don't have any payment arrangement and now my account is in arrears I don't know what must I do now please help. (+***)