Pathetic Client Service

I have made an arrangement with Pathcare and I have it documented on email and have been paying according to the arrangement but Blake & Associates calls me all the time, everyday to ask when I will be making payment for the same account. I need clarity as to where the account is because the consultant Luyanda (from Balke & Assosiates) who keeps calling me does not understand what I am telling her. I even spoke to her supervisor Theresia Ramasamy who told me my arrangement with Pathcare is null & void. How can this be? According to both Luyanda and Theresia, they can see i made payment but yet every time they call they want to know when I am making payment. I need clarity please