arrangement of payment what is it for?

I have been getting calls from the rudest consultant with regards to the payment on my account , i make and arrangement for payment as they have requested, but the consultant i just spoke with advised that they will keep on calling me and billing me for the calls they are making to me while i have already made arrangement. if it so happens that they bill me for unnecessary calls for payment arrangement that i have already made with them i am going to consumers protection and putting my lawyers to home choice for not hiring FAIS accredited consultant to speak to their client and for unnecessary billing on my account, why do they call to make arrangement and then keep on calling while arrangement has already been done. Is this the way to **** us customers we will see if the consumer protection agrees with their method, they also need to get their stuff in order if they need to call their client. this is unacceptable behaviour from them