SDC Termination of Contract without informing me.

Good day. I was with sandton debt review for years. Everything was going well until they terminate the contrat without me knowing. Standard bank is calling me and the interest increase every month yet i am making payment. They say I am paying below creteria. When I ask they say SDC terminated the contract that is why the interest are going up an a summon is held against me. Like how. I am so dissappointed and stressed,