It depends on the terms and conditions of the agreement. If there is a default and when the same is a clause in the agreement, then it is possible to terminate. However, in this case, you are the person to receive the payment. If you have made the contract agreement, then you are the person to decide the termination of the agreement and not the other party. It is mutually agreed upon. Since the details are not clear from your statement, it is not possible to clearly advise you on this. One thing is clear: if the agreement is canceled, then the party will lose the ground of collecting the dues.