Absa
Help me stay revoked due to late payment

I need help . i sign a help u stay/sell with absa 2 years back and r not allowed to diffult on payments . i didnt pay june but paid twice in july . they still revoked my agreemnet saying cause i didnt pay they r revoking it and i must pay full installment from now on . adn i cant i really cant . i need someone to help me plsss.