Netflix complaint: Double billing for the same account.

Hi, my name is Marcus E. Williams Sr., and I have three Netflix accounts mainly for my children and my elderly parents. About 4 months ago, my dad ed me that his Netflix account was turned off. I contacted Netflix and they told me that my payment did not go through so I paid with my debit card to re-establish services. The next month when I checked my bills, I noticed that Netflix was charging me twice for the same account. I noticed that this happened for about 4 months. I called Netflix customer service to inquire about why it was happening and to request a refund for the months double charged. I spoke with a Ruselle who would not give me her last name so I asked to speak with her manager, who she said was Demetrius and he was unavailable and she would not give me his last name either. To make a long story short, they did not refund me for the double billing.