Continued ********** Netflix Charges

I continue to experience the same challenge, over a year since getting the explorer ultra and it does not seem like I will ever get a permanent resolve! My children logged into their father's Netflix account using his details and while he continues to pay for his subscription, DSTV continues to charge me as well. I have to write in every month and demand and fight for my refund as this is completely unacceptable and **********. I have provided all the evidence to prove that the Netflix account holder continues to pay for his subscription. I have been accused of choosing an option of merging the two accounts and have had to show them step by step how one logs into Netflix on the decoder and no where does it give an option to merge or not. It is really frustrating what I have to go through every month and dealing with arrogant consultants is just the kind of service I have to come to expect every single month. Please I beg you, please find a permanent resolution, I really do not enjoy speaking to you people every month over the same problem. Its enough now